import sys

# Command line arguments are stored into sys.argv
# print(sys.argv[1:])

# I used the slice [1:] to print all the elements except the first
# This because the first element of sys.argv is the program name
# So the first argument is sys.argv[1], the second is sys.argv[2] ecc

print("File name: " + sys.argv[0])
print("Arguments:")
for i in sys.argv[1:]:
    print(i)

让我们把这个文件命名为command_line.py，然后运行它:

C:\Users\simone> python command_line.py arg1 arg2 arg3 ecc
File name: command_line.py
Arguments:
arg1
arg2
arg3
ecc

现在让我们写一个简单的程序sum.py:

import sys

try:
    print(sum(map(float, sys.argv[1:])))
except:
    print("An error has occurred")

结果:

C:\Users\simone> python sum.py 10 4 6 3
23

如果你需要快速而不灵活的东西

main.py:

import sys

first_name = sys.argv[1]
last_name = sys.argv[2]
print("Hello " + first_name + " " + last_name)

然后运行python main.py James Smith

产生以下输出:

你好，詹姆斯·史密斯

还有一个选项是argh。它建立在argparse的基础上，让你可以写这样的东西:

import argh

# declaring:

def echo(text):
    "Returns given word as is."
    return text

def greet(name, greeting='Hello'):
    "Greets the user with given name. The greeting is customizable."
    return greeting + ', ' + name

# assembling:

parser = argh.ArghParser()
parser.add_commands([echo, greet])

# dispatching:

if __name__ == '__main__':
    parser.dispatch()

它将自动生成帮助等等，您可以使用装饰器来提供关于参数解析应该如何工作的额外指导。

一种方法是使用sys.argv。这将打印脚本名称作为第一个参数以及传递给它的所有其他参数。

import sys

for arg in sys.argv:
    print arg

我建议使用docopt作为其他选项的简单替代。

Docopt是一个新的项目，它通过解析您的——help使用消息来工作，而不是要求您自己实现所有内容。您只需将您的使用消息放入POSIX格式。

只是四处宣传argparse，因为这些原因它更好。从本质上讲:

(从链接复制)

argparse module can handle positional and optional arguments, while optparse can handle only optional arguments argparse isn’t dogmatic about what your command line interface should look like - options like -file or /file are supported, as are required options. Optparse refuses to support these features, preferring purity over practicality argparse produces more informative usage messages, including command-line usage determined from your arguments, and help messages for both positional and optional arguments. The optparse module requires you to write your own usage string, and has no way to display help for positional arguments. argparse supports action that consume a variable number of command-line args, while optparse requires that the exact number of arguments (e.g. 1, 2, or 3) be known in advance argparse supports parsers that dispatch to sub-commands, while optparse requires setting allow_interspersed_args and doing the parser dispatch manually

我个人最喜欢的是:

Argparse允许类型和 add_argument()的操作参数 用simple指定 调用对象，而optparse需要 破解类属性，比如 获取STORE_ACTIONS或CHECK_METHODS 正确的参数检查