How to read/process command line arguments?

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I am originally a C programmer. I have seen numerous tricks and "hacks" to read many different arguments.

What are some of the ways Python programmers can do this?
Jun 4, 2018 in Python by charlie_brown
• 7,760 points
83 views

1 answer to this question.

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The canonical solution in the standard library is argparse (docs):

Here is an example:

from argparse import ArgumentParser

parser = ArgumentParser()
parser.add_argument("-f", "--file", dest="filename",
                    help="write report to FILE", metavar="FILE")
parser.add_argument("-q", "--quiet",
                    action="store_false", dest="verbose", default=True,
                    help="don't print status messages to stdout")

args = parser.parse_args()

argparse supports (among other things):

  • Multiple options in any order.
  • Short and long options.
  • Default values.
  • Generation of a usage help message
answered Jun 4, 2018 by aryya
• 7,350 points

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