def get_help(parser):
"""
Return help text for the parser.
:param parser: parser
:type parser: ArgumentParser
:return: fully formatted help string
:rtype: str
"""
# Code almost identical with parser.print_help() with next changes:
# it return text instead print
# it place group 'command arguments' to the first place
width = min(get_terminal_width(), 100)
formatter = HelpFormatter(prog=parser.prog,
max_help_position=30,
width=width)
# usage
formatter.add_usage(parser.usage, parser._actions,
parser._mutually_exclusive_groups)
# description
formatter.add_text(parser.description)
# positionals, optionals and user-defined groups
groups = list(parser._action_groups)
groups.sort(key=lambda x: x.title != 'command arguments')
for action_group in groups:
formatter.start_section(action_group.title)
formatter.add_text(action_group.description)
formatter.add_arguments(action_group._group_actions)
formatter.end_section()
# epilog
formatter.add_text(parser.epilog)
# determine help from format above
return formatter.format_help()
def add_usage(self, usage, actions, groups, prefix=None):
HelpFormatter.add_usage(self, usage, actions, groups, prefix="Usage: ")
def add_usage(self, usage, actions, groups, prefix=None):
HelpFormatter.add_usage(self, usage, actions, groups, prefix="Usage: ")
