python 命令行使用(command line options usage)

1,使用模块getopt

  看个例子:

import getopt,sys

__version__ = '1.0.0'

_debug = 0

def main():
    try:
        opts,args = getopt.getopt(sys.argv[1:], 'ho:vd', ['help','output='])
    except getopt.GetoptError,e:
        print str(e)
        usage()
        sys.exit()
    
    output = False
    
    for o,a in opts:
        if o == '-v':
            print 'version:' + __version__
        elif o == '-d':
            global _debug
            _debbug = 1
        elif o in ("-h","--help"):
            usage()
            sys.exit()
        elif o in ("-o","--output="):
            output = a
            print output
        else:
            assert False,"unhandled Exception"

def usage():
    print 'usage'
    
if __name__ == '__main__':
    main()

2,使用模块optparse

 

  python.org上面是这样介绍optparse的:

  optparse is a more convenient,flexible,and powerful library for parsing command-line options then the old getpopt moudle.optparse uses a more declarative style of command-line parsing:you create an instance of OptionParser,populate it with options, and parse the command line.optparse allows users to specify options in the conventional GNU/POSIX syntax,and additionally generates help message for you.(http://docs.python.org/2.6/library/optparse.html#module-optparse

  这个模块我个人觉得就是简化了再写一个usage函数。不过这个模块在python 的 version 2.7 以后就不推荐使用了(Deprecated since version 2.7: The optparse module is deprecated and will not be developed further; development will continue with the argparse module.

3,使用模块argparse

  http://docs.python.org/2/library/argparse.html#module-argparse

 

我个人已经非常习惯使用第一个模块getopt了,觉得用着习惯了,基本的需求也能够满足。

 

posted @ 2013-05-20 14:53  jiezhao  阅读(1560)  评论(0编辑  收藏  举报