subcommand

I am converting Bash shell installer utility to Python 2.7 and need to implement complex CLI so I am able to parse tens of parameters (potentially up to ~150). These are names of Puppet class variables in addition to a dozen of generic deployment options, which where available in shell version. However after I have started to add more variables I faced are several challenges: 1. I need to group parameters into separate dictionaries so deployment options are separated from Puppet variables. If they are thrown into the same bucket, then I will have to write some logic to sort them, potentially

I'm working with argparse and am trying to mix sub-commands and positional arguments, and the following issue came up. This code runs fine: import argparse parser = argparse.ArgumentParser() subparsers = parser.add_subparsers() parser.add_argument('positional') subparsers.add_parser('subpositional') parser.parse_args('subpositional positional'.split()) The above code parses the args into Namespace(positional='positional') , however when I change the positional argument to have nargs='?' as such: import argparse parser = argparse.ArgumentParser() subparsers = parser.add_subparsers() parser.add

I need to implement a command line interface in which the program accepts subcommands. For example, if the program is called “foo”, the CLI would look like foo cmd1 <cmd1-options> foo cmd2 foo cmd3 <cmd3-options> cmd1 and cmd3 must be used with at least one of their options and the three cmd* arguments are always exclusive. I am trying to use subparsers in argparse, but with no success for the moment. The problem is with cmd2 , that has no arguments: if I try to add the subparser entry with no arguments, the namespace returned by parse_args will not contain any information telling me that this

I have the following code (using Python 2.7): # shared command line options, like --version or --verbose parser_shared = argparse.ArgumentParser(add_help=False) parser_shared.add_argument('--version', action='store_true') # the main parser, inherits from `parser_shared` parser = argparse.ArgumentParser(description='main', parents=[parser_shared]) # several subcommands, which can't inherit from the main parser, since # it would expect subcommands ad infinitum subparsers = parser.add_subparsers('db', parents=[parser_shared]) ... args = parser.parse_args() Now I would like to be able to call this