python - 使用 getopt 的命令行选项和参数

Question

我正在尝试用 python 编写一段代码，以使用 getopt 模块获取命令行选项和参数。这是我的代码:

import getopt
import sys

def usage ():
    print('Usage')

def main():
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'xy:')
    except getopt.GetoptError as err:
        print(err)
        usage()
        sys.exit()

    for o,a in opts:
        if o in ("-x", "--xxx"):
            print(a)
        elif o in ("-y", "--yyy"):
            print(a)
        else:
            usage()
            sys.exit()

if __name__ == "__main__":
    main()

问题是我无法读取选项x 的参数，但我可以读取y 的参数。我应该怎么做才能解决这个问题？

Answer 1

试试 getopt.getopt(sys.argv[1:], 'x:y:')

http://docs.python.org/library/getopt.html

Parses command line options and parameter list. args is the argument list to be parsed, without the leading reference to the running program. Typically, this means sys.argv[1:]. options is the string of option letters that the script wants to recognize, with options that require an argument followed by a colon (':'; i.e., the same format that Unix getopt() uses).