I think a more canonical way to do this is via:
command --feature
and
command --no-feature
argparse
supports this version nicely:
parser.add_argument('--feature', dest='feature', action='store_true') parser.add_argument('--no-feature', dest='feature', action='store_false') parser.set_defaults(feature=True)
Of course, if you really want the --arg <True|False>
version, you could pass ast.literal_eval
as the “type”, or a user defined function …
def t_or_f(arg): ua = str(arg).upper() if 'TRUE'.startswith(ua): return True elif 'FALSE'.startswith(ua): return False else: pass #error condition maybe?
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