python之统计类函数执行次数

我想计算我在类 CLASS 中执行特定函数 FUNCTION 的次数。 我试图通过在类 中定义一个全局变量来做到这一点code>counting_function_execution 并在每次执行函数时增加它:

class CLASS: 
    global counting_function_execution  
    counting_function_execution  = 0 
 
    def __init__(self,name): 
        self.name = name 
 
    def FUNCTION(self): 
        print("Hi " + self.name) 
        print("This function was already excecuted ", counting_function_execution, " number of times.") 
        counting_function_execution += 1 

但是，当我这样做时:

test = CLASS("Fred") 
test.FUNCTION() 
test.FUNCTION() 

我得到:

--------------------------------------------------------------------------- 
UnboundLocalError                         Traceback (most recent call last) 
<ipython-input-104-dc8f3ae96700> in <module>() 
      1 test = CLASS("Fred") 
----> 2 test.say_hi() 
 
<ipython-input-100-d0166079c633> in say_hi(self) 
      8     def say_hi(self): 
      9         print("Hi " + self.name) 
---> 10         print("This function was already excecuted ", counting_function_execution, " number of times.") 
     11         counting_function_execution += 1 
     12  
 
UnboundLocalError: local variable 'counting_function_execution' referenced before assignment 

请您参考如下方法:

问题是，在函数 CLASS.FUNCTION 中，您没有引用类变量 counting_function_execution，而是另一个同名的局部变量。< br/> 这就是错误“在赋值前被引用”的原因，因为您在初始化之前引用了该局部变量。

要引用正确的变量，您可以使用self.counting_function_execution(实例的变量)，或CLASS.counting_function_execution(类的静态变量)