捕获从 subprocess.Popen 模块运行的 python 函数的 REAL 输出

Question

我正在尝试在终端中运行我的文件“counting.py”，但不是直接运行。我正在使用“almost.py”中的子进程模块，它告诉终端在counting.py中运行特定的函数“count(a, b)”。

***count(a, b) 接受两个字符串 a 和 b 并返回总字数

almost.py 成功引导终端在counting.py 中运行count(a, b)。但是，在通过子进程运行后，我无法检索 count(a, b) 函数的实际输出。我该怎么做？

几乎.py

import subprocess 
output = subprocess.Popen(['python', 'counting.py', 'count', '"let roll"', '"love it most "'])
print (output) #it is not actually return the real value of count(a, b)!!! 

counting.py

from sys import argv

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__":
  print(count (argv[2], argv[3]))

Answer 1

subprocess 模块将返回 subprocess.Popen python 对象。

你可以用这段代码做同样的想法。

from counting import count

output = count("let roll","love it most")
print output