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#!/usr/bin/env python
# coding=utf-8
"""A simple example demonstrating the following:
1) How arguments and options get parsed and passed to commands
2) How to change what syntax get parsed as a comment and stripped from the arguments
This is intended to serve as a live demonstration so that developers can experiment with and understand how command
and argument parsing is intended to work.
"""
import pyparsing
import cmd2
from cmd2 import options, make_option
class ArgumentAndOptionPrinter(cmd2.Cmd):
""" Example cmd2 application where we create commands that just print the arguments they are called with."""
def __init__(self):
# Uncomment this line to disable Python-style comments but still allow C-style comments
# self.commentGrammars = pyparsing.Or([pyparsing.cStyleComment])
# Make sure to call this super class __init__ after setting commentGrammars and not before
cmd2.Cmd.__init__(self)
def do_aprint(self, arg):
"""Print the argument string this basic command is called with."""
print('aprint was called with argument: {!r}'.format(arg))
@options([make_option('-p', '--piglatin', action="store_true", help="atinLay"),
make_option('-s', '--shout', action="store_true", help="N00B EMULATION MODE"),
make_option('-r', '--repeat', type="int", help="output [n] times")], arg_desc='positional_arg_string')
def do_oprint(self, arg, opts=None):
"""Print the options and argument list this options command was called with."""
print('oprint was called with the following\n\toptions: {!r}\n\targuments: {!r}'.format(opts, arg))
if __name__ == '__main__':
app = ArgumentAndOptionPrinter()
app.cmdloop()
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