PyPI 官网下载 | argparse_helper-0.9.1.tar.gz

# A wrapper around argparse Writing complex subcommand parsers using `argparse` is certainly possible, but it involves a lot of laborious repetition. This library provides a small wrapper around `argparse` that adds a convenience method. That lets you specify a sequence of words that form a command, together with flags - and the definitions of those flags are passed at the same time. parser = ArgumentParser() parser.add_command("foo bar baz --json", func=lambda *args: print("foo-bar-baz"), json=dict(default=False, action="store_true"), ) parser.add_command("foo bar quux", func=lambda *args: print("foo-bar-quux"), ) The `func` parameter will be set on the resulting namespace. Note, there is no particular requirement for the arguments that must be passed to `func` - this is down to the library user to define. Additionally, a new `argparse.Action` subclass is provided, `OptionalOverride`. This supports having the *same* flag appear in a global position and be repeated by a subcommand. It works well - in as much as defaults set by the global position won't be re-set in the subordinate position. parser.add_command("--flag", flag=dict(default="foo")) parser.add_command("xyzzy --flag", flag=dict(action=OptionalOverride)) Where a flag is repeated in an `add_command` call, the second and subsequent values receive an `OptionalOveride` setting automatically. parser.add_command("--glob xyzzy --glob", glob=dict(action=OptionalOverride)) Finally, `AtMostOnce` is supplied as an action type; this causes an explicit error (rather than just overriding the previous value) if a flag is specified more than once.