Web Reference: Mar 26, 2026 · While argparse is the default recommended standard library module for implementing basic command line applications, authors with more exacting requirements for exactly how their command line applications behave may find it doesn’t provide the necessary level of control. The docs say, "Changed in version 3.11: Calling add_argument_group () or add_mutually_exclusive_group () on a mutually exclusive group is deprecated." See docs.python.org/3.11/library/argparse.html#mutual-exclusion A group of arguments and options can be marked as mutually exclusive using :mutex(argument_or_option, ...) method of the Parser class. If more than one element of a mutually exclusive group is used, an error is raised.
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