Python argparse dict arg

Question

I want to receive a dict(str -> str) argument from the command line. Does argparse.ArgumentParser provide it? Or any other library?

For the

Answer 1

Python one-line argparse dictionary arguments argparse_dictionary.py

# $ python argparse_dictionary.py --arg_dict=1=11,2=22;3=33 --arg_dict=a=,b,c=cc,=dd,=ee=,
# Namespace(arg_dict={'1': '11', '2': '22', '3': '33', 'a': '', 'c': 'cc', '': 'dd'})

import argparse

arg_parser = argparse.ArgumentParser()
arg_parser.add_argument(
    '--arg_dict',
    action=type(
        '', (argparse.Action, ),
        dict(__call__=lambda self, parser, namespace, values, option_string: getattr(
            namespace, self.dest).update(
                dict([
                    v.split('=') for v in values.replace(';', ',').split(',')
                    if len(v.split('=')) == 2
                ])))),
    default={},
    metavar='KEY1=VAL1,KEY2=VAL2;KEY3=VAL3...',
)
print(arg_parser.parse_args())