計數值不增加

Question

我有一個名爲myGlobal.py的python文件，在這個文件中我把count聲明爲一個全局變量。

import datetime 
import time 
import os 

count = 0 
failCount = 0 

def counterstart: 
    global count 
    count +=1 

我在另一個文件中調用此計數器。所以每次我調用一個函數的時候，我希望通過計數器1，增加該文件是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() 

但每當我跑script.py，計數顯示爲只有0。

這是怎麼發生的？

Answer 1

import myGlobal 

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

def foo(): 
    myGlobal.count += 1 

foo() 
print myGlobal.count # 2 

---

所以這裏是一個基於Python的裝飾解決方案。它會計算特定功能的呼叫次數：

# 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()