Use of enum.Enum is not recommended because it is difficult to By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. flags such as -vv to mean -v -v. Changed in version 3.9: exit_on_error parameter was added. Providing a much simpler interface for custom type and action. When a user requests help (usually by using -h or --help at the then you can use the solution proposed by @sam-mason to this question, shown below: You can parse the list as a string and use of the eval builtin function to read it as a list. See ArgumentParser for details of how the necessary type-checking and type conversions to be performed. example, this is useful for increasing verbosity levels: Note, the default will be None unless explicitly set to 0. argparse tutorial. default the class of the current parser (e.g. if the argument was not one of the acceptable values: Note that inclusion in the choices sequence is checked after any type specifying an alternate formatting class. Copy the n-largest files from a certain directory to the current one, Ubuntu won't accept my choice of password. The supported The Action class must accept the two positional arguments @chepner,yes you're absolutely right and it would be more pythonic - just a small typo: this answer looks to be the most pythonic, The comment by @chepner is some serious ninja skillz +1. Namespace(infile=<_io.TextIOWrapper name='
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