python - 统计一个类的实例在执行完另一个函数后执行了多少次函数

Question

基于 this question ，我知道如何计算函数 FUNCTION 在类 CLASS 的实例中执行了多少次。现在，我有另一个问题:我如何计算第二个函数 FUNCTION2 在第一个函数 之后执行了多少次(对于类 CLASS 的一个实例) FUNCTION 被执行了？

这是我如何尝试的一个小例子:

class CLASS:
    # Initializing counting for first function
    counting_function_execution  = 0

    def __init__(self,name):
        self.name = name

    def FUNCTION1(self):
        # Initializing counting for second function
        counting_excution_after_FUNCTION = 0

        self.counting_function_execution += 1
        print("FUNCTION 1 was excecuted ", self.counting_function_execution, " time.")

    def FUNCTION2(self):
        counting_excution_after_FUNCTION += 1
        print("FUNCTION 2 was excecuted ", self.counting_excution_after_FUNCTION, " time after FUNCTION.")

...但是我得到了:

test = CLASS("Fred")
test.FUNCTION1()
test.FUNCTION2()
test.FUNCTION2()

输出:

FUNCTION 1 was excecuted  1  time.
---------------------------------------------------------------------------
UnboundLocalError                         Traceback (most recent call last)
<ipython-input-148-d67aeefa671e> in <module>()
      1 test = CLASS("Fred")
      2 test.FUNCTION1()
----> 3 test.FUNCTION2()
      4 test.FUNCTION2()

<ipython-input-147-6a6d7adb1af9> in FUNCTION2(self)
     15 
     16     def FUNCTION2(self):
---> 17         counting_excution_after_FUNCTION += 1
     18         print("FUNCTION 2 was excecuted ", self.counting_excution_after_FUNCTION, " time after FUNCTION.")

UnboundLocalError: local variable 'counting_excution_after_FUNCTION' referenced before assignment

Answer 1

如果您跟踪 FUNCTION1 被调用的次数，您可以在 FUNCTION2 中测试它并确保它在开始计数之前大于零 FUNCTION2 :

class CLASS:

    def __init__(self,name):
        self.name = name
        # initialize instance counters -- each instance gets its own counts
        self.counting_function_execution_1 = 0
        self.counting_function_execution_2 = 0

    def FUNCTION1(self):
        self.counting_function_execution_1 += 1
        print("FUNCTION 1 was excecuted ", self.counting_function_execution_1, " number of times.")

    def FUNCTION2(self):
        if self.counting_function_execution_1:     # don't count unless function1 has run
            self.counting_function_execution_2 += 1
        print("FUNCTION 2 was excecuted ", self.counting_function_execution_2, " number of times after FUNCTION.")

c = CLASS('the dude')
c.FUNCTION2() #0
c.FUNCTION2() #0
c.FUNCTION1()

c.FUNCTION2() #1
c.FUNCTION2() #2