str.lower() Return a copy of the string with all the cased characters [4] converted to lowercase. The lowercasing algorithm used is described in section 3.13 of the Unicode Standard.

user_call(frame, argument_list) This method is called from dispatch_call() when there is the possibility that a break might be necessary anywhere inside the called function.

decompress(data, max_length=-1) Decompress data (a bytes-like object), returning uncompressed data as bytes. Some of data may be buffered internally, for use in later calls to decompress(). The returned data should be concatenated with the output of any previous calls to decompress(). If max_length is nonnegative, returns at most max_length bytes of decompressed data. If this limit is reached and further output can be produced, the needs_input attribute will be set to False. In this case, th

HTTPRedirectHandler.http_error_302(req, fp, code, msg, hdrs) The same as http_error_301(), but called for the ‘found’ response.

ArgumentParser.add_argument_group(title=None, description=None) By default, ArgumentParser groups command-line arguments into “positional arguments” and “optional arguments” when displaying help messages. When there is a better conceptual grouping of arguments than this default one, appropriate groups can be created using the add_argument_group() method: >>> parser = argparse.ArgumentParser(prog='PROG', add_help=False) >>> group = parser.add_argument_group('group') >>

exception multiprocessing.ProcessError The base class of all multiprocessing exceptions.

email.utils.parseaddr(address) Parse address – which should be the value of some address-containing field such as To or Cc – into its constituent realname and email address parts. Returns a tuple of that information, unless the parse fails, in which case a 2-tuple of ('', '') is returned.

Node.cloneNode(deep) Clone this node. Setting deep means to clone all child nodes as well. This returns the clone.

doctype(name, pubid, system) Handles a doctype declaration. name is the doctype name. pubid is the public identifier. system is the system identifier. This method does not exist on the default TreeBuilder class. New in version 3.2.

exception OSError([arg]) exception OSError(errno, strerror[, filename[, winerror[, filename2]]]) This exception is raised when a system function returns a system-related error, including I/O failures such as “file not found” or “disk full” (not for illegal argument types or other incidental errors). The second form of the constructor sets the corresponding attributes, described below. The attributes default to None if not specified. For backwards compatibility, if three arguments are passed,