test/py: use " for docstrings

Python's coding style docs indicate to use " not ' for docstrings.

test/py has other violations of the coding style docs, since the docs
specify a stranger style than I would expect, but nobody has complained
about those yet:-)

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

19 files changed, 245 insertions, 245 deletions

diff --git a/test/py/conftest.py b/test/py/conftest.py
index c1f19ce..a4e54c6 100644
--- a/test/py/conftest.py
+++ b/test/py/conftest.py
@@ -29,7 +29,7 @@ log = None
 console = None
 
 def mkdir_p(path):
-    '''Create a directory path.
+    """Create a directory path.
 
     This includes creating any intermediate/parent directories. Any errors
     caused due to already extant directories are ignored.
@@ -39,7 +39,7 @@ def mkdir_p(path):
 
     Returns:
         Nothing.
-    '''
+    """
 
     try:
         os.makedirs(path)
@@ -50,14 +50,14 @@ def mkdir_p(path):
             raise
 
 def pytest_addoption(parser):
-    '''pytest hook: Add custom command-line options to the cmdline parser.
+    """pytest hook: Add custom command-line options to the cmdline parser.
 
     Args:
         parser: The pytest command-line parser.
 
     Returns:
         Nothing.
-    '''
+    """
 
     parser.addoption('--build-dir', default=None,
         help='U-Boot build directory (O=)')
@@ -73,14 +73,14 @@ def pytest_addoption(parser):
         help='Compile U-Boot before running tests')
 
 def pytest_configure(config):
-    '''pytest hook: Perform custom initialization at startup time.
+    """pytest hook: Perform custom initialization at startup time.
 
     Args:
         config: The pytest configuration.
 
     Returns:
         Nothing.
-    '''
+    """
 
     global log
     global console
@@ -190,7 +190,7 @@ def pytest_configure(config):
         console = u_boot_console_exec_attach.ConsoleExecAttach(log, ubconfig)
 
 def pytest_generate_tests(metafunc):
-    '''pytest hook: parameterize test functions based on custom rules.
+    """pytest hook: parameterize test functions based on custom rules.
 
     If a test function takes parameter(s) (fixture names) of the form brd__xxx
     or env__xxx, the brd and env configuration dictionaries are consulted to
@@ -202,7 +202,7 @@ def pytest_generate_tests(metafunc):
 
     Returns:
         Nothing.
-    '''
+    """
 
     subconfigs = {
         'brd': console.config.brd,
@@ -229,14 +229,14 @@ def pytest_generate_tests(metafunc):
 
 @pytest.fixture(scope='function')
 def u_boot_console(request):
-    '''Generate the value of a test's u_boot_console fixture.
+    """Generate the value of a test's u_boot_console fixture.
 
     Args:
         request: The pytest request.
 
     Returns:
         The fixture value.
-    '''
+    """
 
     console.ensure_spawned()
     return console
@@ -247,7 +247,7 @@ tests_skipped = set()
 tests_passed = set()
 
 def pytest_itemcollected(item):
-    '''pytest hook: Called once for each test found during collection.
+    """pytest hook: Called once for each test found during collection.
 
     This enables our custom result analysis code to see the list of all tests
     that should eventually be run.
@@ -257,12 +257,12 @@ def pytest_itemcollected(item):
 
     Returns:
         Nothing.
-    '''
+    """
 
     tests_not_run.add(item.name)
 
 def cleanup():
-    '''Clean up all global state.
+    """Clean up all global state.
 
     Executed (via atexit) once the entire test process is complete. This
     includes logging the status of all tests, and the identity of any failed
@@ -273,7 +273,7 @@ def cleanup():
 
     Returns:
         Nothing.
-    '''
+    """
 
     if console:
         console.close()
@@ -295,7 +295,7 @@ def cleanup():
 atexit.register(cleanup)
 
 def setup_boardspec(item):
-    '''Process any 'boardspec' marker for a test.
+    """Process any 'boardspec' marker for a test.
 
     Such a marker lists the set of board types that a test does/doesn't
     support. If tests are being executed on an unsupported board, the test is
@@ -306,7 +306,7 @@ def setup_boardspec(item):
 
     Returns:
         Nothing.
-    '''
+    """
 
     mark = item.get_marker('boardspec')
     if not mark:
@@ -323,7 +323,7 @@ def setup_boardspec(item):
         pytest.skip('board not supported')
 
 def setup_buildconfigspec(item):
-    '''Process any 'buildconfigspec' marker for a test.
+    """Process any 'buildconfigspec' marker for a test.
 
     Such a marker lists some U-Boot configuration feature that the test
     requires. If tests are being executed on an U-Boot build that doesn't
@@ -334,7 +334,7 @@ def setup_buildconfigspec(item):
 
     Returns:
         Nothing.
-    '''
+    """
 
     mark = item.get_marker('buildconfigspec')
     if not mark:
@@ -344,7 +344,7 @@ def setup_buildconfigspec(item):
             pytest.skip('.config feature not enabled')
 
 def pytest_runtest_setup(item):
-    '''pytest hook: Configure (set up) a test item.
+    """pytest hook: Configure (set up) a test item.
 
     Called once for each test to perform any custom configuration. This hook
     is used to skip the test if certain conditions apply.
@@ -354,14 +354,14 @@ def pytest_runtest_setup(item):
 
     Returns:
         Nothing.
-    '''
+    """
 
     log.start_section(item.name)
     setup_boardspec(item)
     setup_buildconfigspec(item)
 
 def pytest_runtest_protocol(item, nextitem):
-    '''pytest hook: Called to execute a test.
+    """pytest hook: Called to execute a test.
 
     This hook wraps the standard pytest runtestprotocol() function in order
     to acquire visibility into, and record, each test function's result.
@@ -372,7 +372,7 @@ def pytest_runtest_protocol(item, nextitem):
 
     Returns:
         A list of pytest reports (test result data).
-    '''
+    """
 
     reports = runtestprotocol(item, nextitem=nextitem)
     failed = None
diff --git a/test/py/multiplexed_log.py b/test/py/multiplexed_log.py
index 5059bbf..c2a3b89 100644
--- a/test/py/multiplexed_log.py
+++ b/test/py/multiplexed_log.py
@@ -14,12 +14,12 @@ import subprocess
 mod_dir = os.path.dirname(os.path.abspath(__file__))
 
 class LogfileStream(object):
-    '''A file-like object used to write a single logical stream of data into
+    """A file-like object used to write a single logical stream of data into
     a multiplexed log file. Objects of this type should be created by factory
-    functions in the Logfile class rather than directly.'''
+    functions in the Logfile class rather than directly."""
 
     def __init__(self, logfile, name, chained_file):
-        '''Initialize a new object.
+        """Initialize a new object.
 
         Args:
             logfile: The Logfile object to log to.
@@ -29,26 +29,26 @@ class LogfileStream(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.logfile = logfile
         self.name = name
         self.chained_file = chained_file
 
     def close(self):
-        '''Dummy function so that this class is "file-like".
+        """Dummy function so that this class is "file-like".
 
         Args:
             None.
 
         Returns:
             Nothing.
-        '''
+        """
 
         pass
 
     def write(self, data, implicit=False):
-        '''Write data to the log stream.
+        """Write data to the log stream.
 
         Args:
             data: The data to write tot he file.
@@ -60,33 +60,33 @@ class LogfileStream(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.logfile.write(self, data, implicit)
         if self.chained_file:
             self.chained_file.write(data)
 
     def flush(self):
-        '''Flush the log stream, to ensure correct log interleaving.
+        """Flush the log stream, to ensure correct log interleaving.
 
         Args:
             None.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.logfile.flush()
         if self.chained_file:
             self.chained_file.flush()
 
 class RunAndLog(object):
-    '''A utility object used to execute sub-processes and log their output to
+    """A utility object used to execute sub-processes and log their output to
     a multiplexed log file. Objects of this type should be created by factory
-    functions in the Logfile class rather than directly.'''
+    functions in the Logfile class rather than directly."""
 
     def __init__(self, logfile, name, chained_file):
-        '''Initialize a new object.
+        """Initialize a new object.
 
         Args:
             logfile: The Logfile object to log to.
@@ -96,18 +96,18 @@ class RunAndLog(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.logfile = logfile
         self.name = name
         self.chained_file = chained_file
 
     def close(self):
-        '''Clean up any resources managed by this object.'''
+        """Clean up any resources managed by this object."""
         pass
 
     def run(self, cmd, cwd=None, ignore_errors=False):
-        '''Run a command as a sub-process, and log the results.
+        """Run a command as a sub-process, and log the results.
 
         Args:
             cmd: The command to execute.
@@ -120,7 +120,7 @@ class RunAndLog(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         msg = "+" + " ".join(cmd) + "\n"
         if self.chained_file:
@@ -163,13 +163,13 @@ class RunAndLog(object):
             raise exception
 
 class SectionCtxMgr(object):
-    '''A context manager for Python's "with" statement, which allows a certain
+    """A context manager for Python's "with" statement, which allows a certain
     portion of test code to be logged to a separate section of the log file.
     Objects of this type should be created by factory functions in the Logfile
-    class rather than directly.'''
+    class rather than directly."""
 
     def __init__(self, log, marker):
-        '''Initialize a new object.
+        """Initialize a new object.
 
         Args:
             log: The Logfile object to log to.
@@ -177,7 +177,7 @@ class SectionCtxMgr(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.log = log
         self.marker = marker
@@ -189,18 +189,18 @@ class SectionCtxMgr(object):
         self.log.end_section(self.marker)
 
 class Logfile(object):
-    '''Generates an HTML-formatted log file containing multiple streams of
-    data, each represented in a well-delineated/-structured fashion.'''
+    """Generates an HTML-formatted log file containing multiple streams of
+    data, each represented in a well-delineated/-structured fashion."""
 
     def __init__(self, fn):
-        '''Initialize a new object.
+        """Initialize a new object.
 
         Args:
             fn: The filename to write to.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.f = open(fn, "wt")
         self.last_stream = None
@@ -217,7 +217,7 @@ class Logfile(object):
 """)
 
     def close(self):
-        '''Close the log file.
+        """Close the log file.
 
         After calling this function, no more data may be written to the log.
 
@@ -226,7 +226,7 @@ class Logfile(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.f.write("""\
 </tt>
@@ -241,7 +241,7 @@ class Logfile(object):
                  "".join(chr(c) for c in range(127, 256)))
 
     def _escape(self, data):
-        '''Render data format suitable for inclusion in an HTML document.
+        """Render data format suitable for inclusion in an HTML document.
 
         This includes HTML-escaping certain characters, and translating
         control characters to a hexadecimal representation.
@@ -251,7 +251,7 @@ class Logfile(object):
 
         Returns:
             An escaped version of the data.
-        '''
+        """
 
         data = data.replace(chr(13), "")
         data = "".join((c in self._nonprint) and ("%%%02x" % ord(c)) or
@@ -260,14 +260,14 @@ class Logfile(object):
         return data
 
     def _terminate_stream(self):
-        '''Write HTML to the log file to terminate the current stream's data.
+        """Write HTML to the log file to terminate the current stream's data.
 
         Args:
             None.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.cur_evt += 1
         if not self.last_stream:
@@ -280,7 +280,7 @@ class Logfile(object):
         self.last_stream = None
 
     def _note(self, note_type, msg):
-        '''Write a note or one-off message to the log file.
+        """Write a note or one-off message to the log file.
 
         Args:
             note_type: The type of note. This must be a value supported by the
@@ -289,7 +289,7 @@ class Logfile(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._terminate_stream()
         self.f.write("<div class=\"" + note_type + "\">\n<pre>")
@@ -297,14 +297,14 @@ class Logfile(object):
         self.f.write("\n</pre></div>\n")
 
     def start_section(self, marker):
-        '''Begin a new nested section in the log file.
+        """Begin a new nested section in the log file.
 
         Args:
             marker: The name of the section that is starting.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._terminate_stream()
         self.blocks.append(marker)
@@ -314,7 +314,7 @@ class Logfile(object):
                      "\">Section: " + blk_path + "</div>\n")
 
     def end_section(self, marker):
-        '''Terminate the current nested section in the log file.
+        """Terminate the current nested section in the log file.
 
         This function validates proper nesting of start_section() and
         end_section() calls. If a mismatch is found, an exception is raised.
@@ -324,7 +324,7 @@ class Logfile(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         if (not self.blocks) or (marker != self.blocks[-1]):
             raise Exception("Block nesting mismatch: \"%s\" \"%s\"" %
@@ -337,7 +337,7 @@ class Logfile(object):
         self.blocks.pop()
 
     def section(self, marker):
-        '''Create a temporary section in the log file.
+        """Create a temporary section in the log file.
 
         This function creates a context manager for Python's "with" statement,
         which allows a certain portion of test code to be logged to a separate
@@ -352,96 +352,96 @@ class Logfile(object):
 
         Returns:
             A context manager object.
-        '''
+        """
 
         return SectionCtxMgr(self, marker)
 
     def error(self, msg):
-        '''Write an error note to the log file.
+        """Write an error note to the log file.
 
         Args:
             msg: A message describing the error.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("error", msg)
 
     def warning(self, msg):
-        '''Write an warning note to the log file.
+        """Write an warning note to the log file.
 
         Args:
             msg: A message describing the warning.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("warning", msg)
 
     def info(self, msg):
-        '''Write an informational note to the log file.
+        """Write an informational note to the log file.
 
         Args:
             msg: An informational message.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("info", msg)
 
     def action(self, msg):
-        '''Write an action note to the log file.
+        """Write an action note to the log file.
 
         Args:
             msg: A message describing the action that is being logged.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("action", msg)
 
     def status_pass(self, msg):
-        '''Write a note to the log file describing test(s) which passed.
+        """Write a note to the log file describing test(s) which passed.
 
         Args:
             msg: A message describing passed test(s).
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("status-pass", msg)
 
     def status_skipped(self, msg):
-        '''Write a note to the log file describing skipped test(s).
+        """Write a note to the log file describing skipped test(s).
 
         Args:
             msg: A message describing passed test(s).
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("status-skipped", msg)
 
     def status_fail(self, msg):
-        '''Write a note to the log file describing failed test(s).
+        """Write a note to the log file describing failed test(s).
 
         Args:
             msg: A message describing passed test(s).
 
         Returns:
             Nothing.
-        '''
+        """
 
         self._note("status-fail", msg)
 
     def get_stream(self, name, chained_file=None):
-        '''Create an object to log a single stream's data into the log file.
+        """Create an object to log a single stream's data into the log file.
 
         This creates a "file-like" object that can be written to in order to
         write a single stream's data to the log file. The implementation will
@@ -456,12 +456,12 @@ class Logfile(object):
 
         Returns:
             A file-like object.
-        '''
+        """
 
         return LogfileStream(self, name, chained_file)
 
     def get_runner(self, name, chained_file=None):
-        '''Create an object that executes processes and logs their output.
+        """Create an object that executes processes and logs their output.
 
         Args:
             name: The name of this sub-process.
@@ -470,12 +470,12 @@ class Logfile(object):
 
         Returns:
             A RunAndLog object.
-        '''
+        """
 
         return RunAndLog(self, name, chained_file)
 
     def write(self, stream, data, implicit=False):
-        '''Write stream data into the log file.
+        """Write stream data into the log file.
 
         This function should only be used by instances of LogfileStream or
         RunAndLog.
@@ -491,7 +491,7 @@ class Logfile(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         if stream != self.last_stream:
             self._terminate_stream()
@@ -507,13 +507,13 @@ class Logfile(object):
         self.last_stream = stream
 
     def flush(self):
-        '''Flush the log stream, to ensure correct log interleaving.
+        """Flush the log stream, to ensure correct log interleaving.
 
         Args:
             None.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.f.flush()
diff --git a/test/py/tests/test_000_version.py b/test/py/tests/test_000_version.py
index d262f05..43a02e7 100644
--- a/test/py/tests/test_000_version.py
+++ b/test/py/tests/test_000_version.py
@@ -9,7 +9,7 @@
 # command prompt.
 
 def test_version(u_boot_console):
-    '''Test that the "version" command prints the U-Boot version.'''
+    """Test that the "version" command prints the U-Boot version."""
 
     # "version" prints the U-Boot sign-on message. This is usually considered
     # an error, so that any unexpected reboot causes an error. Here, this
diff --git a/test/py/tests/test_dfu.py b/test/py/tests/test_dfu.py
index 6c1a363..0f69eef 100644
--- a/test/py/tests/test_dfu.py
+++ b/test/py/tests/test_dfu.py
@@ -12,7 +12,7 @@ import os.path
 import pytest
 import u_boot_utils
 
-'''
+"""
 Note: This test relies on:
 
 a) boardenv_* to contain configuration values to define which USB ports are
@@ -44,7 +44,7 @@ ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="66
 (You may wish to change the group ID instead of setting the permissions wide
 open. All that matters is that the user ID running the test can access the
 device.)
-'''
+"""
 
 # The set of file sizes to test. These values trigger various edge-cases such
 # as one less than, equal to, and one greater than typical USB max packet
@@ -71,7 +71,7 @@ first_usb_dev_port = None
 
 @pytest.mark.buildconfigspec('cmd_dfu')
 def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
-    '''Test the "dfu" command; the host system must be able to enumerate a USB
+    """Test the "dfu" command; the host system must be able to enumerate a USB
     device when "dfu" is running, various DFU transfers are tested, and the
     USB device must disappear when "dfu" is aborted.
 
@@ -86,10 +86,10 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
     Returns:
         Nothing.
-    '''
+    """
 
     def start_dfu():
-        '''Start U-Boot's dfu shell command.
+        """Start U-Boot's dfu shell command.
 
         This also waits for the host-side USB enumeration process to complete.
 
@@ -98,7 +98,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
         Returns:
             Nothing.
-        '''
+        """
 
         fh = u_boot_utils.attempt_to_open_file(
             env__usb_dev_port['host_usb_dev_node'])
@@ -120,7 +120,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
         fh.close()
 
     def stop_dfu(ignore_errors):
-        '''Stop U-Boot's dfu shell command from executing.
+        """Stop U-Boot's dfu shell command from executing.
 
         This also waits for the host-side USB de-enumeration process to
         complete.
@@ -133,7 +133,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
         Returns:
             Nothing.
-        '''
+        """
 
         try:
             u_boot_console.log.action(
@@ -148,7 +148,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
                 raise
 
     def run_dfu_util(alt_setting, fn, up_dn_load_arg):
-        '''Invoke dfu-util on the host.
+        """Invoke dfu-util on the host.
 
         Args:
             alt_setting: The DFU "alternate setting" identifier to interact
@@ -159,7 +159,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
         Returns:
             Nothing.
-        '''
+        """
 
         cmd = ['dfu-util', '-a', str(alt_setting), up_dn_load_arg, fn]
         if 'host_usb_port_path' in env__usb_dev_port:
@@ -168,7 +168,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
         u_boot_console.wait_for('Ctrl+C to exit ...')
 
     def dfu_write(alt_setting, fn):
-        '''Write a file to the target board using DFU.
+        """Write a file to the target board using DFU.
 
         Args:
             alt_setting: The DFU "alternate setting" identifier to interact
@@ -177,12 +177,12 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
         Returns:
             Nothing.
-        '''
+        """
 
         run_dfu_util(alt_setting, fn, '-D')
 
     def dfu_read(alt_setting, fn):
-        '''Read a file from the target board using DFU.
+        """Read a file from the target board using DFU.
 
         Args:
             alt_setting: The DFU "alternate setting" identifier to interact
@@ -191,7 +191,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
         Returns:
             Nothing.
-        '''
+        """
 
         # dfu-util fails reads/uploads if the host file already exists
         if os.path.exists(fn):
@@ -199,7 +199,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
         run_dfu_util(alt_setting, fn, '-U')
 
     def dfu_write_read_check(size):
-        '''Test DFU transfers of a specific size of data
+        """Test DFU transfers of a specific size of data
 
         This function first writes data to the board then reads it back and
         compares the written and read back data. Measures are taken to avoid
@@ -210,7 +210,7 @@ def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
 
         Returns:
             Nothing.
-        '''
+        """
 
         test_f = u_boot_utils.PersistentRandomFile(u_boot_console,
             'dfu_%d.bin' % size, size)
diff --git a/test/py/tests/test_env.py b/test/py/tests/test_env.py
index 557c3af..651303f 100644
--- a/test/py/tests/test_env.py
+++ b/test/py/tests/test_env.py
@@ -10,34 +10,34 @@ import pytest
 # FIXME: This might be useful for other tests;
 # perhaps refactor it into ConsoleBase or some other state object?
 class StateTestEnv(object):
-    '''Container that represents the state of all U-Boot environment variables.
+    """Container that represents the state of all U-Boot environment variables.
     This enables quick determination of existant/non-existant variable
     names.
-    '''
+    """
 
     def __init__(self, u_boot_console):
-        '''Initialize a new StateTestEnv object.
+        """Initialize a new StateTestEnv object.
 
         Args:
             u_boot_console: A U-Boot console.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.u_boot_console = u_boot_console
         self.get_env()
         self.set_var = self.get_non_existent_var()
 
     def get_env(self):
-        '''Read all current environment variables from U-Boot.
+        """Read all current environment variables from U-Boot.
 
         Args:
             None.
 
         Returns:
             Nothing.
-        '''
+        """
 
         response = self.u_boot_console.run_command('printenv')
         self.env = {}
@@ -48,27 +48,27 @@ class StateTestEnv(object):
             self.env[var] = value
 
     def get_existent_var(self):
-        '''Return the name of an environment variable that exists.
+        """Return the name of an environment variable that exists.
 
         Args:
             None.
 
         Returns:
             The name of an environment variable.
-        '''
+        """
 
         for var in self.env:
             return var
 
     def get_non_existent_var(self):
-        '''Return the name of an environment variable that does not exist.
+        """Return the name of an environment variable that does not exist.
 
         Args:
             None.
 
         Returns:
             The name of an environment variable.
-        '''
+        """
 
         n = 0
         while True:
@@ -80,7 +80,7 @@ class StateTestEnv(object):
 ste = None
 @pytest.fixture(scope='function')
 def state_test_env(u_boot_console):
-    '''pytest fixture to provide a StateTestEnv object to tests.'''
+    """pytest fixture to provide a StateTestEnv object to tests."""
 
     global ste
     if not ste:
@@ -88,7 +88,7 @@ def state_test_env(u_boot_console):
     return ste
 
 def unset_var(state_test_env, var):
-    '''Unset an environment variable.
+    """Unset an environment variable.
 
     This both executes a U-Boot shell command and updates a StateTestEnv
     object.
@@ -99,14 +99,14 @@ def unset_var(state_test_env, var):
 
     Returns:
         Nothing.
-    '''
+    """
 
     state_test_env.u_boot_console.run_command('setenv %s' % var)
     if var in state_test_env.env:
         del state_test_env.env[var]
 
 def set_var(state_test_env, var, value):
-    '''Set an environment variable.
+    """Set an environment variable.
 
     This both executes a U-Boot shell command and updates a StateTestEnv
     object.
@@ -118,26 +118,26 @@ def set_var(state_test_env, var, value):
 
     Returns:
         Nothing.
-    '''
+    """
 
     state_test_env.u_boot_console.run_command('setenv %s "%s"' % (var, value))
     state_test_env.env[var] = value
 
 def validate_empty(state_test_env, var):
-    '''Validate that a variable is not set, using U-Boot shell commands.
+    """Validate that a variable is not set, using U-Boot shell commands.
 
     Args:
         var: The variable name to test.
 
     Returns:
         Nothing.
-    '''
+    """
 
     response = state_test_env.u_boot_console.run_command('echo $%s' % var)
     assert response == ''
 
 def validate_set(state_test_env, var, value):
-    '''Validate that a variable is set, using U-Boot shell commands.
+    """Validate that a variable is set, using U-Boot shell commands.
 
     Args:
         var: The variable name to test.
@@ -145,7 +145,7 @@ def validate_set(state_test_env, var, value):
 
     Returns:
         Nothing.
-    '''
+    """
 
     # echo does not preserve leading, internal, or trailing whitespace in the
     # value. printenv does, and hence allows more complete testing.
@@ -153,20 +153,20 @@ def validate_set(state_test_env, var, value):
     assert response == ('%s=%s' % (var, value))
 
 def test_env_echo_exists(state_test_env):
-    '''Test echoing a variable that exists.'''
+    """Test echoing a variable that exists."""
 
     var = state_test_env.get_existent_var()
     value = state_test_env.env[var]
     validate_set(state_test_env, var, value)
 
 def test_env_echo_non_existent(state_test_env):
-    '''Test echoing a variable that doesn't exist.'''
+    """Test echoing a variable that doesn't exist."""
 
     var = state_test_env.set_var
     validate_empty(state_test_env, var)
 
 def test_env_printenv_non_existent(state_test_env):
-    '''Test printenv error message for non-existant variables.'''
+    """Test printenv error message for non-existant variables."""
 
     var = state_test_env.set_var
     c = state_test_env.u_boot_console
@@ -175,14 +175,14 @@ def test_env_printenv_non_existent(state_test_env):
     assert(response == '## Error: "%s" not defined' % var)
 
 def test_env_unset_non_existent(state_test_env):
-    '''Test unsetting a nonexistent variable.'''
+    """Test unsetting a nonexistent variable."""
 
     var = state_test_env.get_non_existent_var()
     unset_var(state_test_env, var)
     validate_empty(state_test_env, var)
 
 def test_env_set_non_existent(state_test_env):
-    '''Test set a non-existant variable.'''
+    """Test set a non-existant variable."""
 
     var = state_test_env.set_var
     value = 'foo'
@@ -190,7 +190,7 @@ def test_env_set_non_existent(state_test_env):
     validate_set(state_test_env, var, value)
 
 def test_env_set_existing(state_test_env):
-    '''Test setting an existant variable.'''
+    """Test setting an existant variable."""
 
     var = state_test_env.set_var
     value = 'bar'
@@ -198,14 +198,14 @@ def test_env_set_existing(state_test_env):
     validate_set(state_test_env, var, value)
 
 def test_env_unset_existing(state_test_env):
-    '''Test unsetting a variable.'''
+    """Test unsetting a variable."""
 
     var = state_test_env.set_var
     unset_var(state_test_env, var)
     validate_empty(state_test_env, var)
 
 def test_env_expansion_spaces(state_test_env):
-    '''Test expanding a variable that contains a space in its value.'''
+    """Test expanding a variable that contains a space in its value."""
 
     var_space = None
     var_test = None
diff --git a/test/py/tests/test_help.py b/test/py/tests/test_help.py
index 894f3b5..420090c 100644
--- a/test/py/tests/test_help.py
+++ b/test/py/tests/test_help.py
@@ -4,6 +4,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
 def test_help(u_boot_console):
-    '''Test that the "help" command can be executed.'''
+    """Test that the "help" command can be executed."""
 
     u_boot_console.run_command('help')
diff --git a/test/py/tests/test_hush_if_test.py b/test/py/tests/test_hush_if_test.py
index cf4c3ae..8b88425 100644
--- a/test/py/tests/test_hush_if_test.py
+++ b/test/py/tests/test_hush_if_test.py
@@ -95,7 +95,7 @@ subtests = (
 )
 
 def exec_hush_if(u_boot_console, expr, result):
-    '''Execute a shell "if" command, and validate its result.'''
+    """Execute a shell "if" command, and validate its result."""
 
     cmd = 'if ' + expr + '; then echo true; else echo false; fi'
     response = u_boot_console.run_command(cmd)
@@ -103,7 +103,7 @@ def exec_hush_if(u_boot_console, expr, result):
 
 @pytest.mark.buildconfigspec('sys_hush_parser')
 def test_hush_if_test_setup(u_boot_console):
-    '''Set up environment variables used during the "if" tests.'''
+    """Set up environment variables used during the "if" tests."""
 
     u_boot_console.run_command('setenv ut_var_nonexistent')
     u_boot_console.run_command('setenv ut_var_exists 1')
@@ -111,13 +111,13 @@ def test_hush_if_test_setup(u_boot_console):
 @pytest.mark.buildconfigspec('sys_hush_parser')
 @pytest.mark.parametrize('expr,result', subtests)
 def test_hush_if_test(u_boot_console, expr, result):
-    '''Test a single "if test" condition.'''
+    """Test a single "if test" condition."""
 
     exec_hush_if(u_boot_console, expr, result)
 
 @pytest.mark.buildconfigspec('sys_hush_parser')
 def test_hush_if_test_teardown(u_boot_console):
-    '''Clean up environment variables used during the "if" tests.'''
+    """Clean up environment variables used during the "if" tests."""
 
     u_boot_console.run_command('setenv ut_var_exists')
 
@@ -126,7 +126,7 @@ def test_hush_if_test_teardown(u_boot_console):
 # Of those, only UMS currently allows file removal though.
 @pytest.mark.boardspec('sandbox')
 def test_hush_if_test_host_file_exists(u_boot_console):
-    '''Test the "if test -e" shell command.'''
+    """Test the "if test -e" shell command."""
 
     test_file = u_boot_console.config.result_dir + \
         '/creating_this_file_breaks_u_boot_tests'
diff --git a/test/py/tests/test_md.py b/test/py/tests/test_md.py
index 32cce4f..5fe2582 100644
--- a/test/py/tests/test_md.py
+++ b/test/py/tests/test_md.py
@@ -8,8 +8,8 @@ import u_boot_utils
 
 @pytest.mark.buildconfigspec('cmd_memory')
 def test_md(u_boot_console):
-    '''Test that md reads memory as expected, and that memory can be modified
-    using the mw command.'''
+    """Test that md reads memory as expected, and that memory can be modified
+    using the mw command."""
 
     ram_base = u_boot_utils.find_ram_base(u_boot_console)
     addr = '%08x' % ram_base
@@ -24,8 +24,8 @@ def test_md(u_boot_console):
 
 @pytest.mark.buildconfigspec('cmd_memory')
 def test_md_repeat(u_boot_console):
-    '''Test command repeat (via executing an empty command) operates correctly
-    for "md"; the command must repeat and dump an incrementing address.'''
+    """Test command repeat (via executing an empty command) operates correctly
+    for "md"; the command must repeat and dump an incrementing address."""
 
     ram_base = u_boot_utils.find_ram_base(u_boot_console)
     addr_base = '%08x' % ram_base
diff --git a/test/py/tests/test_net.py b/test/py/tests/test_net.py
index 9c46551..68eedde 100644
--- a/test/py/tests/test_net.py
+++ b/test/py/tests/test_net.py
@@ -8,7 +8,7 @@
 import pytest
 import u_boot_utils
 
-'''
+"""
 Note: This test relies on boardenv_* containing configuration values to define
 which the network environment available for testing. Without this, this test
 will be automatically skipped.
@@ -46,16 +46,16 @@ env__net_tftp_readable_file = {
     "size": 5058624,
     "crc32": "c2244b26",
 }
-'''
+"""
 
 net_set_up = False
 
 def test_net_pre_commands(u_boot_console):
-    '''Execute any commands required to enable network hardware.
+    """Execute any commands required to enable network hardware.
 
     These commands are provided by the boardenv_* file; see the comment at the
     beginning of this file.
-    '''
+    """
 
     init_usb = u_boot_console.config.env.get('env__net_uses_usb', False)
     if init_usb:
@@ -67,11 +67,11 @@ def test_net_pre_commands(u_boot_console):
 
 @pytest.mark.buildconfigspec('cmd_dhcp')
 def test_net_dhcp(u_boot_console):
-    '''Test the dhcp command.
+    """Test the dhcp command.
 
     The boardenv_* file may be used to enable/disable this test; see the
     comment at the beginning of this file.
-    '''
+    """
 
     test_dhcp = u_boot_console.config.env.get('env__net_dhcp_server', False)
     if not test_dhcp:
@@ -86,11 +86,11 @@ def test_net_dhcp(u_boot_console):
 
 @pytest.mark.buildconfigspec('net')
 def test_net_setup_static(u_boot_console):
-    '''Set up a static IP configuration.
+    """Set up a static IP configuration.
 
     The configuration is provided by the boardenv_* file; see the comment at
     the beginning of this file.
-    '''
+    """
 
     env_vars = u_boot_console.config.env.get('env__net_static_env_vars', None)
     if not env_vars:
@@ -104,12 +104,12 @@ def test_net_setup_static(u_boot_console):
 
 @pytest.mark.buildconfigspec('cmd_ping')
 def test_net_ping(u_boot_console):
-    '''Test the ping command.
+    """Test the ping command.
 
     The $serverip (as set up by either test_net_dhcp or test_net_setup_static)
     is pinged. The test validates that the host is alive, as reported by the
     ping command's output.
-    '''
+    """
 
     if not net_set_up:
         pytest.skip("Network not initialized")
@@ -119,14 +119,14 @@ def test_net_ping(u_boot_console):
 
 @pytest.mark.buildconfigspec('cmd_net')
 def test_net_tftpboot(u_boot_console):
-    '''Test the tftpboot command.
+    """Test the tftpboot command.
 
     A file is downloaded from the TFTP server, its size and optionally its
     CRC32 are validated.
 
     The details of the file to download are provided by the boardenv_* file;
     see the comment at the beginning of this file.
-    '''
+    """
 
     if not net_set_up:
         pytest.skip("Network not initialized")
diff --git a/test/py/tests/test_sandbox_exit.py b/test/py/tests/test_sandbox_exit.py
index 1ec3607..d1aa308 100644
--- a/test/py/tests/test_sandbox_exit.py
+++ b/test/py/tests/test_sandbox_exit.py
@@ -9,14 +9,14 @@ import signal
 @pytest.mark.boardspec('sandbox')
 @pytest.mark.buildconfigspec('reset')
 def test_reset(u_boot_console):
-    '''Test that the "reset" command exits sandbox process.'''
+    """Test that the "reset" command exits sandbox process."""
 
     u_boot_console.run_command('reset', wait_for_prompt=False)
     assert(u_boot_console.validate_exited())
 
 @pytest.mark.boardspec('sandbox')
 def test_ctrl_c(u_boot_console):
-    '''Test that sending SIGINT to sandbox causes it to exit.'''
+    """Test that sending SIGINT to sandbox causes it to exit."""
 
     u_boot_console.kill(signal.SIGINT)
     assert(u_boot_console.validate_exited())
diff --git a/test/py/tests/test_shell_basics.py b/test/py/tests/test_shell_basics.py
index 719ce61..32e5f83 100644
--- a/test/py/tests/test_shell_basics.py
+++ b/test/py/tests/test_shell_basics.py
@@ -5,13 +5,13 @@
 # Test basic shell functionality, such as commands separate by semi-colons.
 
 def test_shell_execute(u_boot_console):
-    '''Test any shell command.'''
+    """Test any shell command."""
 
     response = u_boot_console.run_command('echo hello')
     assert response.strip() == 'hello'
 
 def test_shell_semicolon_two(u_boot_console):
-    '''Test two shell commands separate by a semi-colon.'''
+    """Test two shell commands separate by a semi-colon."""
 
     cmd = 'echo hello; echo world'
     response = u_boot_console.run_command(cmd)
@@ -19,8 +19,8 @@ def test_shell_semicolon_two(u_boot_console):
     assert response.index('hello') < response.index('world')
 
 def test_shell_semicolon_three(u_boot_console):
-    '''Test three shell commands separate by a semi-colon, with variable
-    expansion dependencies between them.'''
+    """Test three shell commands separate by a semi-colon, with variable
+    expansion dependencies between them."""
 
     cmd = 'setenv list 1; setenv list ${list}2; setenv list ${list}3; ' + \
         'echo ${list}'
@@ -29,7 +29,7 @@ def test_shell_semicolon_three(u_boot_console):
     u_boot_console.run_command('setenv list')
 
 def test_shell_run(u_boot_console):
-    '''Test the "run" shell command.'''
+    """Test the "run" shell command."""
 
     u_boot_console.run_command('setenv foo \"setenv monty 1; setenv python 2\"')
     u_boot_console.run_command('run foo')
diff --git a/test/py/tests/test_sleep.py b/test/py/tests/test_sleep.py
index 437b6bb..74add89 100644
--- a/test/py/tests/test_sleep.py
+++ b/test/py/tests/test_sleep.py
@@ -6,8 +6,8 @@ import pytest
 import time
 
 def test_sleep(u_boot_console):
-    '''Test the sleep command, and validate that it sleeps for approximately
-    the correct amount of time.'''
+    """Test the sleep command, and validate that it sleeps for approximately
+    the correct amount of time."""
 
     # 3s isn't too long, but is enough to cross a few second boundaries.
     sleep_time = 3
diff --git a/test/py/tests/test_ums.py b/test/py/tests/test_ums.py
index f482cfe..21d40a9 100644
--- a/test/py/tests/test_ums.py
+++ b/test/py/tests/test_ums.py
@@ -14,7 +14,7 @@ import re
 import time
 import u_boot_utils
 
-'''
+"""
 Note: This test relies on:
 
 a) boardenv_* to contain configuration values to define which USB ports are
@@ -69,11 +69,11 @@ root permissions. For example:
 
 This entry is only needed if any block_devs above contain a
 writable_fs_partition value.
-'''
+"""
 
 @pytest.mark.buildconfigspec('cmd_usb_mass_storage')
 def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
-    '''Test the "ums" command; the host system must be able to enumerate a UMS
+    """Test the "ums" command; the host system must be able to enumerate a UMS
     device when "ums" is running, block and optionally file I/O are tested,
     and this device must disappear when "ums" is aborted.
 
@@ -88,7 +88,7 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
 
     Returns:
         Nothing.
-    '''
+    """
 
     have_writable_fs_partition = 'writable_fs_partition' in env__block_devs[0]
     if not have_writable_fs_partition:
@@ -120,7 +120,7 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
         mounted_test_fn = mount_point + '/' + mount_subdir + test_f.fn
 
     def start_ums():
-        '''Start U-Boot's ums shell command.
+        """Start U-Boot's ums shell command.
 
         This also waits for the host-side USB enumeration process to complete.
 
@@ -129,7 +129,7 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
 
         Returns:
             Nothing.
-        '''
+        """
 
         u_boot_console.log.action(
             'Starting long-running U-Boot ums shell command')
@@ -142,21 +142,21 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
         fh.close()
 
     def mount():
-        '''Mount the block device that U-Boot exports.
+        """Mount the block device that U-Boot exports.
 
         Args:
             None.
 
         Returns:
             Nothing.
-        '''
+        """
 
         u_boot_console.log.action('Mounting exported UMS device')
         cmd = ('/bin/mount', host_ums_part_node)
         u_boot_utils.run_and_log(u_boot_console, cmd)
 
     def umount(ignore_errors):
-        '''Unmount the block device that U-Boot exports.
+        """Unmount the block device that U-Boot exports.
 
         Args:
             ignore_errors: Ignore any errors. This is useful if an error has
@@ -166,14 +166,14 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
 
         Returns:
             Nothing.
-        '''
+        """
 
         u_boot_console.log.action('Unmounting UMS device')
         cmd = ('/bin/umount', host_ums_part_node)
         u_boot_utils.run_and_log(u_boot_console, cmd, ignore_errors)
 
     def stop_ums(ignore_errors):
-        '''Stop U-Boot's ums shell command from executing.
+        """Stop U-Boot's ums shell command from executing.
 
         This also waits for the host-side USB de-enumeration process to
         complete.
@@ -186,7 +186,7 @@ def test_ums(u_boot_console, env__usb_dev_port, env__block_devs):
 
         Returns:
             Nothing.
-        '''
+        """
 
         u_boot_console.log.action(
             'Stopping long-running U-Boot ums shell command')
diff --git a/test/py/tests/test_unknown_cmd.py b/test/py/tests/test_unknown_cmd.py
index 2de93e0..c27ab49 100644
--- a/test/py/tests/test_unknown_cmd.py
+++ b/test/py/tests/test_unknown_cmd.py
@@ -4,8 +4,8 @@
 # SPDX-License-Identifier: GPL-2.0
 
 def test_unknown_command(u_boot_console):
-    '''Test that executing an unknown command causes U-Boot to print an
-    error.'''
+    """Test that executing an unknown command causes U-Boot to print an
+    error."""
 
     # The "unknown command" error is actively expected here,
     # so error detection for it is disabled.
diff --git a/test/py/u_boot_console_base.py b/test/py/u_boot_console_base.py
index bb834b0..c500fb3 100644
--- a/test/py/u_boot_console_base.py
+++ b/test/py/u_boot_console_base.py
@@ -24,12 +24,12 @@ pattern_unknown_command = re.compile('Unknown command \'.*\' - try \'help\'')
 pattern_error_notification = re.compile('## Error: ')
 
 class ConsoleDisableCheck(object):
-    '''Context manager (for Python's with statement) that temporarily disables
+    """Context manager (for Python's with statement) that temporarily disables
     the specified console output error check. This is useful when deliberately
     executing a command that is known to trigger one of the error checks, in
     order to test that the error condition is actually raised. This class is
     used internally by ConsoleBase::disable_check(); it is not intended for
-    direct usage.'''
+    direct usage."""
 
     def __init__(self, console, check_type):
         self.console = console
@@ -42,13 +42,13 @@ class ConsoleDisableCheck(object):
         self.console.disable_check_count[self.check_type] -= 1
 
 class ConsoleBase(object):
-    '''The interface through which test functions interact with the U-Boot
+    """The interface through which test functions interact with the U-Boot
     console. This primarily involves executing shell commands, capturing their
     results, and checking for common error conditions. Some common utilities
-    are also provided too.'''
+    are also provided too."""
 
     def __init__(self, log, config, max_fifo_fill):
-        '''Initialize a U-Boot console connection.
+        """Initialize a U-Boot console connection.
 
         Can only usefully be called by sub-classes.
 
@@ -65,7 +65,7 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.log = log
         self.config = config
@@ -88,7 +88,7 @@ class ConsoleBase(object):
         self.at_prompt_logevt = None
 
     def close(self):
-        '''Terminate the connection to the U-Boot console.
+        """Terminate the connection to the U-Boot console.
 
         This function is only useful once all interaction with U-Boot is
         complete. Once this function is called, data cannot be sent to or
@@ -99,7 +99,7 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         if self.p:
             self.p.close()
@@ -107,7 +107,7 @@ class ConsoleBase(object):
 
     def run_command(self, cmd, wait_for_echo=True, send_nl=True,
             wait_for_prompt=True):
-        '''Execute a command via the U-Boot console.
+        """Execute a command via the U-Boot console.
 
         The command is always sent to U-Boot.
 
@@ -142,7 +142,7 @@ class ConsoleBase(object):
                 The output from U-Boot during command execution. In other
                 words, the text U-Boot emitted between the point it echod the
                 command string and emitted the subsequent command prompts.
-        '''
+        """
 
         if self.at_prompt and \
                 self.at_prompt_logevt != self.logstream.logfile.cur_evt:
@@ -198,7 +198,7 @@ class ConsoleBase(object):
             raise
 
     def ctrlc(self):
-        '''Send a CTRL-C character to U-Boot.
+        """Send a CTRL-C character to U-Boot.
 
         This is useful in order to stop execution of long-running synchronous
         commands such as "ums".
@@ -208,13 +208,13 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.log.action('Sending Ctrl-C')
         self.run_command(chr(3), wait_for_echo=False, send_nl=False)
 
     def wait_for(self, text):
-        '''Wait for a pattern to be emitted by U-Boot.
+        """Wait for a pattern to be emitted by U-Boot.
 
         This is useful when a long-running command such as "dfu" is executing,
         and it periodically emits some text that should show up at a specific
@@ -226,14 +226,14 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         if type(text) == type(''):
             text = re.escape(text)
         self.p.expect([text])
 
     def drain_console(self):
-        '''Read from and log the U-Boot console for a short time.
+        """Read from and log the U-Boot console for a short time.
 
         U-Boot's console output is only logged when the test code actively
         waits for U-Boot to emit specific data. There are cases where tests
@@ -248,7 +248,7 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         # If we are already not connected to U-Boot, there's nothing to drain.
         # This should only happen when a previous call to run_command() or
@@ -270,7 +270,7 @@ class ConsoleBase(object):
             self.p.timeout = orig_timeout
 
     def ensure_spawned(self):
-        '''Ensure a connection to a correctly running U-Boot instance.
+        """Ensure a connection to a correctly running U-Boot instance.
 
         This may require spawning a new Sandbox process or resetting target
         hardware, as defined by the implementation sub-class.
@@ -282,7 +282,7 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         if self.p:
             return
@@ -320,7 +320,7 @@ class ConsoleBase(object):
             raise
 
     def cleanup_spawn(self):
-        '''Shut down all interaction with the U-Boot instance.
+        """Shut down all interaction with the U-Boot instance.
 
         This is used when an error is detected prior to re-establishing a
         connection with a fresh U-Boot instance.
@@ -332,7 +332,7 @@ class ConsoleBase(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         try:
             if self.p:
@@ -342,7 +342,7 @@ class ConsoleBase(object):
         self.p = None
 
     def validate_version_string_in_text(self, text):
-        '''Assert that a command's output includes the U-Boot signon message.
+        """Assert that a command's output includes the U-Boot signon message.
 
         This is primarily useful for validating the "version" command without
         duplicating the signon text regex in a test function.
@@ -352,12 +352,12 @@ class ConsoleBase(object):
 
         Returns:
             Nothing. An exception is raised if the validation fails.
-        '''
+        """
 
         assert(self.u_boot_version_string in text)
 
     def disable_check(self, check_type):
-        '''Temporarily disable an error check of U-Boot's output.
+        """Temporarily disable an error check of U-Boot's output.
 
         Create a new context manager (for use with the "with" statement) which
         temporarily disables a particular console output error check.
@@ -368,6 +368,6 @@ class ConsoleBase(object):
 
         Returns:
             A context manager object.
-        '''
+        """
 
         return ConsoleDisableCheck(self, check_type)
diff --git a/test/py/u_boot_console_exec_attach.py b/test/py/u_boot_console_exec_attach.py
index 0ca9e7c..19520cb 100644
--- a/test/py/u_boot_console_exec_attach.py
+++ b/test/py/u_boot_console_exec_attach.py
@@ -11,15 +11,15 @@ from u_boot_spawn import Spawn
 from u_boot_console_base import ConsoleBase
 
 class ConsoleExecAttach(ConsoleBase):
-    '''Represents a physical connection to a U-Boot console, typically via a
+    """Represents a physical connection to a U-Boot console, typically via a
     serial port. This implementation executes a sub-process to attach to the
     console, expecting that the stdin/out of the sub-process will be forwarded
     to/from the physical hardware. This approach isolates the test infra-
     structure from the user-/installation-specific details of how to
-    communicate with, and the identity of, serial ports etc.'''
+    communicate with, and the identity of, serial ports etc."""
 
     def __init__(self, log, config):
-        '''Initialize a U-Boot console connection.
+        """Initialize a U-Boot console connection.
 
         Args:
             log: A multiplexed_log.Logfile instance.
@@ -27,7 +27,7 @@ class ConsoleExecAttach(ConsoleBase):
 
         Returns:
             Nothing.
-        '''
+        """
 
         # The max_fifo_fill value might need tweaking per-board/-SoC?
         # 1 would be safe anywhere, but is very slow (a pexpect issue?).
@@ -42,7 +42,7 @@ class ConsoleExecAttach(ConsoleBase):
         runner.close()
 
     def get_spawn(self):
-        '''Connect to a fresh U-Boot instance.
+        """Connect to a fresh U-Boot instance.
 
         The target board is reset, so that U-Boot begins running from scratch.
 
@@ -51,7 +51,7 @@ class ConsoleExecAttach(ConsoleBase):
 
         Returns:
             A u_boot_spawn.Spawn object that is attached to U-Boot.
-        '''
+        """
 
         args = [self.config.board_type, self.config.board_identity]
         s = Spawn(['u-boot-test-console'] + args)
diff --git a/test/py/u_boot_console_sandbox.py b/test/py/u_boot_console_sandbox.py
index eb84150..267f8b0 100644
--- a/test/py/u_boot_console_sandbox.py
+++ b/test/py/u_boot_console_sandbox.py
@@ -10,11 +10,11 @@ from u_boot_spawn import Spawn
 from u_boot_console_base import ConsoleBase
 
 class ConsoleSandbox(ConsoleBase):
-    '''Represents a connection to a sandbox U-Boot console, executed as a sub-
-    process.'''
+    """Represents a connection to a sandbox U-Boot console, executed as a sub-
+    process."""
 
     def __init__(self, log, config):
-        '''Initialize a U-Boot console connection.
+        """Initialize a U-Boot console connection.
 
         Args:
             log: A multiplexed_log.Logfile instance.
@@ -22,12 +22,12 @@ class ConsoleSandbox(ConsoleBase):
 
         Returns:
             Nothing.
-        '''
+        """
 
         super(ConsoleSandbox, self).__init__(log, config, max_fifo_fill=1024)
 
     def get_spawn(self):
-        '''Connect to a fresh U-Boot instance.
+        """Connect to a fresh U-Boot instance.
 
         A new sandbox process is created, so that U-Boot begins running from
         scratch.
@@ -37,25 +37,25 @@ class ConsoleSandbox(ConsoleBase):
 
         Returns:
             A u_boot_spawn.Spawn object that is attached to U-Boot.
-        '''
+        """
 
         return Spawn([self.config.build_dir + '/u-boot'])
 
     def kill(self, sig):
-        '''Send a specific Unix signal to the sandbox process.
+        """Send a specific Unix signal to the sandbox process.
 
         Args:
             sig: The Unix signal to send to the process.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.log.action('kill %d' % sig)
         self.p.kill(sig)
 
     def validate_exited(self):
-        '''Determine whether the sandbox process has exited.
+        """Determine whether the sandbox process has exited.
 
         If required, this function waits a reasonable time for the process to
         exit.
@@ -65,7 +65,7 @@ class ConsoleSandbox(ConsoleBase):
 
         Returns:
             Boolean indicating whether the process has exited.
-        '''
+        """
 
         p = self.p
         self.p = None
diff --git a/test/py/u_boot_spawn.py b/test/py/u_boot_spawn.py
index df4c675..d508075 100644
--- a/test/py/u_boot_spawn.py
+++ b/test/py/u_boot_spawn.py
@@ -12,23 +12,23 @@ import select
 import time
 
 class Timeout(Exception):
-    '''An exception sub-class that indicates that a timeout occurred.'''
+    """An exception sub-class that indicates that a timeout occurred."""
     pass
 
 class Spawn(object):
-    '''Represents the stdio of a freshly created sub-process. Commands may be
+    """Represents the stdio of a freshly created sub-process. Commands may be
     sent to the process, and responses waited for.
-    '''
+    """
 
     def __init__(self, args):
-        '''Spawn (fork/exec) the sub-process.
+        """Spawn (fork/exec) the sub-process.
 
         Args:
             args: array of processs arguments. argv[0] is the command to execute.
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.waited = False
         self.buf = ''
@@ -56,26 +56,26 @@ class Spawn(object):
         self.poll.register(self.fd, select.POLLIN | select.POLLPRI | select.POLLERR | select.POLLHUP | select.POLLNVAL)
 
     def kill(self, sig):
-        '''Send unix signal "sig" to the child process.
+        """Send unix signal "sig" to the child process.
 
         Args:
             sig: The signal number to send.
 
         Returns:
             Nothing.
-        '''
+        """
 
         os.kill(self.pid, sig)
 
     def isalive(self):
-        '''Determine whether the child process is still running.
+        """Determine whether the child process is still running.
 
         Args:
             None.
 
         Returns:
             Boolean indicating whether process is alive.
-        '''
+        """
 
         if self.waited:
             return False
@@ -88,19 +88,19 @@ class Spawn(object):
         return False
 
     def send(self, data):
-        '''Send data to the sub-process's stdin.
+        """Send data to the sub-process's stdin.
 
         Args:
             data: The data to send to the process.
 
         Returns:
             Nothing.
-        '''
+        """
 
         os.write(self.fd, data)
 
     def expect(self, patterns):
-        '''Wait for the sub-process to emit specific data.
+        """Wait for the sub-process to emit specific data.
 
         This function waits for the process to emit one pattern from the
         supplied list of patterns, or for a timeout to occur.
@@ -116,7 +116,7 @@ class Spawn(object):
         Notable exceptions:
             Timeout, if the process did not emit any of the patterns within
             the expected time.
-        '''
+        """
 
         for pi in xrange(len(patterns)):
             if type(patterns[pi]) == type(''):
@@ -161,7 +161,7 @@ class Spawn(object):
                 self.logfile_read.flush()
 
     def close(self):
-        '''Close the stdio connection to the sub-process.
+        """Close the stdio connection to the sub-process.
 
         This also waits a reasonable time for the sub-process to stop running.
 
@@ -170,7 +170,7 @@ class Spawn(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         os.close(self.fd)
         for i in xrange(100):
diff --git a/test/py/u_boot_utils.py b/test/py/u_boot_utils.py
index 522390a..72d24e4 100644
--- a/test/py/u_boot_utils.py
+++ b/test/py/u_boot_utils.py
@@ -11,21 +11,21 @@ import sys
 import time
 
 def md5sum_data(data):
-    '''Calculate the MD5 hash of some data.
+    """Calculate the MD5 hash of some data.
 
     Args:
         data: The data to hash.
 
     Returns:
         The hash of the data, as a binary string.
-    '''
+    """
 
     h = hashlib.md5()
     h.update(data)
     return h.digest()
 
 def md5sum_file(fn, max_length=None):
-    '''Calculate the MD5 hash of the contents of a file.
+    """Calculate the MD5 hash of the contents of a file.
 
     Args:
         fn: The filename of the file to hash.
@@ -35,7 +35,7 @@ def md5sum_file(fn, max_length=None):
 
     Returns:
         The hash of the file content, as a binary string.
-    '''
+    """
 
     with open(fn, 'rb') as fh:
         if max_length:
@@ -46,11 +46,11 @@ def md5sum_file(fn, max_length=None):
     return md5sum_data(data)
 
 class PersistentRandomFile(object):
-    '''Generate and store information about a persistent file containing
-    random data.'''
+    """Generate and store information about a persistent file containing
+    random data."""
 
     def __init__(self, u_boot_console, fn, size):
-        '''Create or process the persistent file.
+        """Create or process the persistent file.
 
         If the file does not exist, it is generated.
 
@@ -66,7 +66,7 @@ class PersistentRandomFile(object):
 
         Returns:
             Nothing.
-        '''
+        """
 
         self.fn = fn
 
@@ -85,7 +85,7 @@ class PersistentRandomFile(object):
             self.content_hash = md5sum_data(data)
 
 def attempt_to_open_file(fn):
-    '''Attempt to open a file, without throwing exceptions.
+    """Attempt to open a file, without throwing exceptions.
 
     Any errors (exceptions) that occur during the attempt to open the file
     are ignored. This is useful in order to test whether a file (in
@@ -98,7 +98,7 @@ def attempt_to_open_file(fn):
     Returns:
         An open file handle to the file, or None if the file could not be
             opened.
-    '''
+    """
 
     try:
         return open(fn, 'rb')
@@ -106,7 +106,7 @@ def attempt_to_open_file(fn):
         return None
 
 def wait_until_open_succeeds(fn):
-    '''Poll until a file can be opened, or a timeout occurs.
+    """Poll until a file can be opened, or a timeout occurs.
 
     Continually attempt to open a file, and return when this succeeds, or
     raise an exception after a timeout.
@@ -116,7 +116,7 @@ def wait_until_open_succeeds(fn):
 
     Returns:
         An open file handle to the file.
-    '''
+    """
 
     for i in xrange(100):
         fh = attempt_to_open_file(fn)
@@ -126,7 +126,7 @@ def wait_until_open_succeeds(fn):
     raise Exception('File could not be opened')
 
 def wait_until_file_open_fails(fn, ignore_errors):
-    '''Poll until a file cannot be opened, or a timeout occurs.
+    """Poll until a file cannot be opened, or a timeout occurs.
 
     Continually attempt to open a file, and return when this fails, or
     raise an exception after a timeout.
@@ -139,7 +139,7 @@ def wait_until_file_open_fails(fn, ignore_errors):
 
     Returns:
         Nothing.
-    '''
+    """
 
     for i in xrange(100):
         fh = attempt_to_open_file(fn)
@@ -152,7 +152,7 @@ def wait_until_file_open_fails(fn, ignore_errors):
     raise Exception('File can still be opened')
 
 def run_and_log(u_boot_console, cmd, ignore_errors=False):
-    '''Run a command and log its output.
+    """Run a command and log its output.
 
     Args:
         u_boot_console: A console connection to U-Boot.
@@ -164,7 +164,7 @@ def run_and_log(u_boot_console, cmd, ignore_errors=False):
 
     Returns:
         Nothing.
-    '''
+    """
 
     runner = u_boot_console.log.get_runner(cmd[0], sys.stdout)
     runner.run(cmd, ignore_errors=ignore_errors)
@@ -172,7 +172,7 @@ def run_and_log(u_boot_console, cmd, ignore_errors=False):
 
 ram_base = None
 def find_ram_base(u_boot_console):
-    '''Find the running U-Boot's RAM location.
+    """Find the running U-Boot's RAM location.
 
     Probe the running U-Boot to determine the address of the first bank
     of RAM. This is useful for tests that test reading/writing RAM, or
@@ -186,7 +186,7 @@ def find_ram_base(u_boot_console):
 
     Returns:
         The address of U-Boot's first RAM bank, as an integer.
-    '''
+    """
 
     global ram_base
     if u_boot_console.config.buildconfig.get('config_cmd_bdi', 'n') != 'y':