Python:对pickle& amp;的误解getopt的

时间:2017-03-28 14:10:39

标签: python python-2.7 pickle getopt

我正在测试酸洗和酸奶getOpts,每个人都成功,但现在我正试图将两者结合起来,我遇到了麻烦。以下是我正在做的事情的片段,

#! /usr/bin/env python

from itertools import groupby, chain
import pickle
import getopt
import sys

def main():

    # default values
    var1 = 6
    var2 = 7
    var3 = 4

    try:
        opts, args = getopt.getopt(sys.argv[1:], 'l:z', ['load=', 'help'])
    except getopt.GetoptError:
        usage()
        sys.exit(2)

    for opt, arg in opts:
        if opt in ('-z', '--help'):
            usage()
            sys.exit(2)
        elif opt in ('-l', '--load'):
            pkl_file = open('data.pkl', 'rb')
            settings = pickle.load(pkl_file)
            var1 = settings[0]
            var2 = settings[1]
            var3 = settings[2]
            pkl_file.close()
        else:
            usage()
            sys.exit(2)

    print ("\nthe values are as follows")
    print ("cvar1: " + str(var1))
    print ("var2: " + str(var2))
    print ("var3: " + str(var3))

if __name__ == "__main__":
    main()

当腌制数据时,我使用以下代码

#! /usr/bin/env python

import pickle

settings =  [3, 15, 4]

output = open('data.pkl', 'wb')

# Pickle dictionary using protocol 0.
pickle.dump(settings, output)

output.close()

但是,当我尝试使用'-l'标志运行时,我收到以下错误

NameError: global name 'usage' is not defined

知道为什么会这样吗?提前谢谢!

1 个答案:

答案 0 :(得分:3)

您正在调用尚未定义的函数(usage())。您需要实现此功能,否则您的代码将无法运行。