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Add example for argparse's append action #131389

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Add example for argparse's append action #131389

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4 changes: 4 additions & 0 deletions Doc/library/argparse.rst
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Original file line number Diff line number Diff line change
@@ -754,6 +754,10 @@ how the command-line arguments should be handled. The supplied actions are:
>>> parser.add_argument('--foo', action='append')
>>> parser.parse_args('--foo 1 --foo 2'.split())
Namespace(foo=['1', '2'])
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('--foo', action='append', default=['0'])
>>> parser.parse_args('--foo 1 --foo 2'.split())
Namespace(foo=['0', '1', '2'])

* ``'append_const'`` - This stores a list, and appends the value specified by
the const_ keyword argument to the list; note that the const_ keyword