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bpo-37726: Prefer argparse over getopt in stdlib tutorial (#15052)
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2 changed files with 16 additions and 3 deletions
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@ -72,10 +72,21 @@ three`` at the command line::
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>>> print(sys.argv)
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['demo.py', 'one', 'two', 'three']
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The :mod:`getopt` module processes *sys.argv* using the conventions of the Unix
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:func:`getopt` function. More powerful and flexible command line processing is
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provided by the :mod:`argparse` module.
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The :mod:`argparse` module provides a mechanism to process command line arguments.
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It should always be preferred over directly processing ``sys.argv`` manually.
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Take, for example, the below snippet of code::
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>>> import argparse
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>>> from getpass import getuser
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>>> parser = argparse.ArgumentParser(description='An argparse example.')
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>>> parser.add_argument('name', nargs='?', default=getuser(), help='The name of someone to greet.')
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>>> parser.add_argument('--verbose', '-v', action='count')
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>>> args = parser.parse_args()
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>>> greeting = ["Hi", "Hello", "Greetings! its very nice to meet you"][args.verbose % 3]
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>>> print(f'{greeting}, {args.name}')
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>>> if not args.verbose:
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>>> print('Try running this again with multiple "-v" flags!')
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.. _tut-stderr:
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