python argparse接收参数使用

# -*- coding:utf-8 -*-
import argparse
if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('integer', type=int, help='display an integer')
    args = parser.parse_args()
    print args
    print args.integer

# 调用及输出: 
(public) D:devprojecttestmongo>python arg_test.py 3
Namespace(integer=3)
3

(public) D:devprojecttestmongo>python arg_test.py
usage: arg_test.py [-h] integer
arg_test.py: error: too few arguments

(public) D:devprojecttestmongo>python arg_test.py "1"
Namespace(integer=1)
1

# -*- coding:utf-8 -*-
import argparse

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--arg1", help="arg1 number", type=int)
    parser.add_argument("--arg2", help="arg2 number", type=int)

    args = parser.parse_args()
    if args.arg1:
        print u"参数1", args.arg1

    if args.arg2:
        print u"参数2", args.arg2

# 调用及输出:
(public) D:devprojecttestmongo>python arg_test.py --arg1 1
参数1 1

(public) D:devprojecttestmongo>python arg_test.py --arg2 2
参数2 2

(public) D:devprojecttestmongo>python arg_test.py --arg1 1 --arg2 2
参数1 1
参数2 2

(public) D:devprojecttestmongo>python arg_test.py 1
usage: arg_test.py [-h] [--arg1 ARG1] [--arg2 ARG2]
arg_test.py: error: unrecognized arguments: 1

(public) D:devprojecttestmongo>python arg_test.py