Spoof argparse in Jupyter Notebook

Question

I am trying to use a function that was written with argparse in a Jupyter Notebook. To do this I'm trying to "spoof" the argparse, but can't figure out how to do it. I found this useful SO question/answer but I'm still understanding something about argparse. Here's what I've got so far:

import sys
import argparse

sys.argv = ['--config-file', "my_config"]


def argument_parser():

    parser = argparse.ArgumentParser()
    parser.add_argument("--config-file", default="", help="path to config file")
    parser.add_argument(
        "opts",
        help="Modify config options",
        default=None,
        nargs=argparse.REMAINDER,
    )
    return parser

Then when I call argument_parser() I get

ArgumentParser(prog='--config-file', usage=None, description=None, formatter_class=<class 'argparse.HelpFormatter'>, conflict_handler='error', add_help=True)

Then I try to parse the arguments with:

args = argument_parser().parse_args()
print("Commandline Args:", args)

The output is:

Commandline Args: Namespace(config_file='', opts=['my_config'])

My goal is to get an output like this:

Commandline Args: Namespace(config_file='my_config')

How do I do this?

score 2 · Accepted Answer · answered Jul 19 '20 at 00:34

import sys
import argparse

sys.argv = ['--config-file','my_config']


def argument_parser():

    parser = argparse.ArgumentParser()
    parser.add_argument("--config-file", default="", help="path to config file")
    parser.add_argument(
        "opts",
        help="Modify config options",
        default=None,
        nargs=argparse.REMAINDER,
    )
    return parser

args = argument_parser().parse_args(sys.argv)
print("Commandline Args:", args)

You should pass the sys.argv to the parse_args method.

Output:

Commandline Args: Namespace(config_file='my_config', opts=[])

Spoof argparse in Jupyter Notebook

1 Answers1