计数值不增加

Question

我有一个名为myGlobal.py的python文件，在这个文件中我把count声明为一个全局变量。

import datetime 
import time 
import os 

count = 0 
failCount = 0 

def counterstart: 
    global count 
    count +=1 

我在另一个文件中调用此计数器。所以每次我调用一个函数的时候，我希望通过计数器1，增加该文件是scripts.py

import os 
from selenium import webdriver 
import datetime 
import time 
from myGlobal import * 

def main(): 
    fnfirst() 
    fnsecond() 
    fnthird() 

def fnfirst(): 
    global count 
    print count 

def fnsecond(): 
    global count 
    print count 

def fnthird(): 
    global count 
    print count 

main() 

但每当我跑script.py，计数显示为只有0。

这是怎么发生的？

Answer 1

import myGlobal 

print myGlobal.count # 0 
myGlobal.count += 1 

def foo(): 
    myGlobal.count += 1 

foo() 
print myGlobal.count # 2 

---

所以这里是一个基于Python的装饰解决方案。它会计算特定功能的呼叫次数：

# File script.py 

import myGlobal 

def count_call(func): 
    def _wrapper(*args, **kwargs): 
     myGlobal.count += 1 
     func(*args, **kwargs) 
    return _wrapper 

@count_call 
def fnfirst(): 
    pass # do something 

@count_call 
def fnsecond(): 
    pass # do something 

def main(): 
    print myGlobal.count # 0 
    fnfirst() 
    print myGlobal.count # 1 
    fnsecond() 
    print myGlobal.count # 2 
    fnfirst() 
    print myGlobal.count # 3 

if __name__ == "__main__": 
    main()