python之将参数发送到 Python 脚本的规范方法是什么

script.py 文件中的以下代码可以(在 chmod 755 script.py 之后)script.py 执行此操作 或到 script.py dothat。

import sys 
 
def dothis(): 
    print "We're doing this." 
 
def dothat(): 
    print "We're doing that." 
 
if __name__ == "__main__": 
    if len(sys.argv) != 2: 
        print "Error: You must specify exactly one function: dothis or dothat" 
        sys.exit(1) 
    if sys.argv[1] == "dothis": 
        dothis() 
    elif sys.argv[1] == "dothat": 
        dothat() 
    else: 
        print "I don't know how to "+sys.argv[1] 

这是从命令行调用两个函数之一的最优雅的方法吗？

请您参考如下方法:

import argparse as ap 
 
def dothis(): 
    print "We're doing this." 
 
def dothat(): 
    print "We're doing that." 
 
if __name__ == "__main__": 
    parser = ap.ArgumentParser() 
    parser.add_argument('thing', choices=['dothis', 'dothat']) 
    args = parser.parse_args() 
    f = locals()[args.thing] 
    f()