def _check_value_key(action:Action, value:Any, key:str, cfg) -> Any:
"""Checks the value for a given action.
Args:
action: The action used for parsing.
value: The value to parse.
key: The configuration key.
Raises:
TypeError: If the value is not valid.
"""
if action.choices is not None and isinstance(action, _ActionSubCommands):
if key == action.dest:
return value
parser = action._name_parser_map[key]
parser.check_config(value) # type: ignore
elif hasattr(action, '_check_type'):
value = action._check_type(value, cfg=cfg) # type: ignore
elif action.type is not None:
try:
if action.nargs in {None, '?'} or action.nargs == 0:
value = action.type(value)
elif value is not None:
for k, v in enumerate(value):
value[k] = action.type(v)
except (TypeError, ValueError) as ex:
raise TypeError('Parser key "'+str(key)+'": '+str(ex)) from ex
return value
