+
−#!/usr/bin/env python
+
−# -*- coding: utf-8 -*-
+
−
+
−"""
+
−find str format options
+
−"""
+
−
+
−import argparse
+
−import os
+
−import subprocess
+
−import sys
+
−
+
−__all__ = ['main']
+
−
+
−def find_keys(string):
+
−    retval = set()
+
−    while True:
+
−        try:
+
−            string.format(**{i:'' for i in retval})
+
−            return retval
+
−        except KeyError as e:
+
−            retval.add(e.message)
+
−
+
−
+
−def main(args=sys.argv[1:]):
+
−
+
−    string = ' '.join(args)
+
−    keys = find_keys(string)
+
−    print ('\n'.join(sorted(keys)))
+
−
+
−if __name__ == '__main__':
+
−    main()