在python中作为命令行参数传递的数字不解释为整数 [英] Numbers passed as command line arguments in python not interpreted as integers

问题描述

我熟悉C，并且已经开始在python中进行实验.我的问题是关于sys.argv命令的.我已经读过它用于命令行解释器，但是当尝试执行一个简单的程序时，我没有得到我期望的结果.

I am familiar with C, and have started experimenting in python. My question is regarding the sys.argv command. I've read it is used for a command line interpreter, but when trying to execute a simple program I don't get the results I expect.

代码:

import sys

a = sys.argv[1]
b = sys.argv[2]

print a, b

print a+b

输入:

python mySum.py 100 200

输出:

100 200
100200

当我添加两个参数时，它们是串联在一起的，而不是将两个值相加在一起.看来这些值被当作字符串了.

When I add the two arguments they are concatenated instead of the two values being added together. It seems that the values are being taken as strings.

如何将它们解释为数字?

How can I interpret them as numerics?

推荐答案

您可以使用int()将参数转换为整数

You can convert the arguments to integers using int()

import sys

a = int(sys.argv[1])  b = int(sys.argv[2])

print a, b

print a+b

输入:python mySum.py 100 200

输出:

100 200
300

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