exception mailbox.ExternalClashError Raised when some mailbox-related condition beyond the control of the program causes it to be unable to proceed, such as when failing to acquire a lock that another program already holds a lock, or when a uniquely-generated file name already exists.

IMAP4.list([directory[, pattern]]) List mailbox names in directory matching pattern. directory defaults to the top-level mail folder, and pattern defaults to match anything. Returned data contains a list of LIST responses.

close() MH instances do not keep any open files, so this method is equivalent to unlock().

TarInfo.pax_headers A dictionary containing key-value pairs of an associated pax extended header.

get_source(fullname) Returns None as extension modules do not have source code.

class pathlib.WindowsPath(*pathsegments) A subclass of Path and PureWindowsPath, this class represents concrete Windows filesystem paths: >>> WindowsPath('c:/Program Files/') WindowsPath('c:/Program Files') pathsegments is specified similarly to PurePath.

classmethod datetime.today() Return the current local datetime, with tzinfo None. This is equivalent to datetime.fromtimestamp(time.time()). See also now(), fromtimestamp().

operator.pow(a, b) operator.__pow__(a, b) Return a ** b, for a and b numbers.

test.support.requires(resource, msg=None) Raise ResourceDenied if resource is not available. msg is the argument to ResourceDenied if it is raised. Always returns True if called by a function whose __name__ is '__main__'. Used when tests are executed by test.regrtest.

is_jump_target True if other code jumps to here, otherwise False