ArgumentParser.add_argument_group(title=None, description=None) By default, ArgumentParser groups command-line

os.getenv(key, default=None) Return the value of the environment variable key if it exists, or default if

curses.ascii.isgraph(c) Checks for ASCII any printable character except space.

class ctypes.c_bool Represent the C bool datatype (more accurately, _Bool from C99). Its value can

os.setxattr(path, attribute, value, flags=0, *, follow_symlinks=True) Set the extended filesystem attribute attribute

ArgumentParser.format_help() Return a string containing a help message, including the program usage and information about the

class argparse.ArgumentParser(prog=None, usage=None, description=None, epilog=None, parents=[], formatter_class=argparse.HelpFormatter, prefix_chars='-', fromfile_prefix_chars=None

class ctypes.OleDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False) Windows only: Instances of

curses.typeahead(fd) Specify that the file descriptor fd be used for typeahead checking. If fd is -1

os.initgroups(username, gid) Call the system initgroups() to initialize the group access list with all of the groups of which