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For some reason I do not use positional arguments in my program but accept "optional" arguments only, controlling whether an argument is truly optional by facilities like narg='?' or action='store_true'. Thus the "optional arguments" in the help text will be misleading. Can I display it simply as "arguments"? Thank you.
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Optional Arguments To add an optional argument, simply omit the required parameter in add_argument() . args = parser.
You can define Python function optional arguments by specifying the name of an argument followed by a default value when you declare a function. You can also use the **kwargs method to accept a variable number of arguments in a function.
Python argparse optional argument These are optional arguments. The module is imported. An argument is added with add_argument . The action set to store_true will store the argument as True , if present.
parse_args will take the arguments you provide on the command line when you run your program and interpret them according to the arguments you have added to your ArgumentParser object.
import argparse
parser = argparse.ArgumentParser()
for grp in parser._action_groups:
if grp.title == 'optional arguments':
grp.title = 'arguments'
...
Well, looking at the argparse source it seems to me that it's as simple as overwriting the title of parser._optionals, like this:
parser._optionals.title = "my mandatory arguments, they are actually optionals, but I'll check for their presence"
Probably I should mention that it's a dirty hack, and your whole idea is a bit insane, since switching to positional arguments is so easy to do, and optional arguments are optional.
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