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"""Utilities for argparse_translator module."""
from argparse import Action, ArgumentParser
from typing import List, Optional, Tuple
def in_group(parser: ArgumentParser, argument_name: str, group_title: str) -> bool:
"""Check if an argument is in a group of an ArgumentParser."""
for action_group in parser._action_groups: # pylint: disable=protected-access
if action_group.title == group_title:
for (
action
) in action_group._group_actions: # pylint: disable=protected-access
opts = action.option_strings
if (opts and opts[0] == argument_name) or action.dest == argument_name:
return True
return False
def remove_argument(parser: ArgumentParser, argument_name: str) -> List[Optional[str]]:
"""Remove an argument from an ArgumentParser."""
groups_w_arg = []
# remove the argument from the parser
for action in parser._actions: # pylint: disable=protected-access
opts = action.option_strings
if (opts and opts[0] == argument_name) or action.dest == argument_name:
parser._remove_action(action) # pylint: disable=protected-access
break
# remove from all groups
for action_group in parser._action_groups: # pylint: disable=protected-access
for action in action_group._group_actions: # pylint: disable=protected-access
opts = action.option_strings
if (opts and opts[0] == argument_name) or action.dest == argument_name:
action_group._group_actions.remove( # pylint: disable=protected-access
action
)
groups_w_arg.append(action_group.title)
# remove from _action_groups dict
parser._option_string_actions.pop( # pylint: disable=protected-access
f"--{argument_name}", None
)
return groups_w_arg
def get_argument_choices(parser: ArgumentParser, argument_name: str) -> Tuple:
"""Get the choices of an argument from an ArgumentParser."""
for action in parser._actions: # pylint: disable=protected-access
opts = action.option_strings
if (opts and opts[0] == argument_name) or action.dest == argument_name:
return tuple(action.choices or ())
return ()
def get_argument_optional_choices(parser: ArgumentParser, argument_name: str) -> bool:
"""Get the optional_choices attribute of an argument from an ArgumentParser."""
for action in parser._actions: # pylint: disable=protected-access
opts = action.option_strings
if (
(opts and opts[0] == argument_name)
or action.dest == argument_name
and hasattr(action, "optional_choices")
):
return (
action.optional_choices # type: ignore[attr-defined] # this is a custom attribute
)
return False
def set_optional_choices(action: Action, optional_choices: bool):
"""Set the optional_choices attribute of an action."""
if not hasattr(action, "optional_choices") and optional_choices:
setattr(action, "optional_choices", optional_choices)
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