Question

我编写了一个python函数，它接受多个参数，我希望它从终端运行，但它不起作用。我做错了什么？

counting.py脚本：

def count (a, b): 
    word = False 
    a = " " + a + " "
    b = " " + b + " "

    result = 0 

    for i in range (len (a)-1): 
        if a[i] == " " and a[i+1] != " ":
            word = True 
            result += 1
        else: 
            word = False

    for i in range (len (b)-1): 
        if b[i] == " " and b[i+1] != " ":
            word = True 
            result += 1
        else: 
            word = False


    return result


if __name__ == "__main__":
    count (a, b)

终端命令：

    python counting.py count "hello world" "let's check you out"

Answer 1

使用sys模型，添加此代码，sys.argv第一个参数是此文件名

import sys
if __name__ == "__main__":
    a = sys.argv[1]
    b = sys.argv[2]
    count(a,b)

终端命令： python counting.py "hello word" "let's check you out" 例如：

import sys
def count(s1, s2):
    print s1 + s2

print sys.argv
count(sys.argv[1], sys.argv[2])

出：

python zzzzzzz.py“hello”“word”

['zzzzzzz.py', 'hello', 'word']
helloword

Answer 2

a和b是count的参数。您不能在该范围之外使用它们。您可以使用sys.argv来访问命令行参数：

from sys import argv
if __name__ == "__main__":
    print(count (argv[1], argv[2]))

在终端中执行带有多个参数的python函数

2 个答案: