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The argparse module was added to Python 2.7 as a replacement for optparse. The example above uses two different forms, -bval and -c val. is a full command-line argument parser tool, and handles non-optional arguments as well. .. a single program, and use subparsers to handle each portion of the command line.
 The argparse module can handle positional and optional arguments, while optparse . With optparse, dispatching to subparsers required disallowing interspersed args For most users, you'll never need to specify a type in string form again.
 The -l in that case is known as an optional argument. That's a The variable is some form of 'magic' that argparse performs for free (i.e. no need to specify which
 BUT, it would still be nice if it could be optional, so that developers could be argparse could allow both optional subparsers (if no subparser matches) . method - creates a name of the form {cmd1,cmd2} for error messages.
 23 Feb 2016 There's not much that can be added to that bug/issue https://bugs.python.org/issue9253. subparsers is a special kind of positional argument.
 5 May 2016 If you print the contents of vars(args) before your function call like this: print(vars(args)) args.func(mc, **vars(args)). Then you can easily verify
 30 Dec 2016 The argparse module includes tools for building command line argument and The previous example uses two different forms, -bval and -c val . argparse is a full command-line argument parser tool, and handles both optional and Each sub-parser also has its own help, describing the arguments and
 The program defines what arguments it requires, and argparse will figure out how . python myprogram.py --help usage: myprogram.py [-h] [--foo FOO] optional generally considered bad form because users expect options to be optional,
 title - title for the sub-parser group in help output; by default “subcommands” if in help; by default it is None and presents sub-commands in form {cmd1, cmd2, ..} '--help']) usage: PROG a [-h] bar positional arguments: bar bar help optional
 15 Jun 2011 Allowing to chose a new subparser for default, instead of one of the . If the command is optional, then this makes the command an option.
     
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