invoking a class method inside the class itself
大家好，我想对类方法的其余部分使用类本身的方法的计算值，但它必须全部计算一次，我需要在类本身内部调用方法，我编写了一个示例：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | class something(): def __init__(): pass def __sum(self, variable_1, variable_2): self.summation = sum(variable_1, variable_2) # I need to calculate summation here once for all: # how does the syntax look likes, which one of these are correct: something.__sum(1, 2) self.__sum(1, 2) # If none of these are correct so what the correct form is? # For example print calculated value here in this method: def do_something_with_summation(self): print(self.summation) |
假设在实例化第一类解决方案时，您将收到
1 2 3 4 5 6 | class something(): def __init__(self, variable1, variable2): self.summation = variable1 + variable2 def do_something_with_summation(self): print(self.summation) |
如果相反，您在其他方法中创建
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | class Something(): def __init__(self): #Put some initialization code here def some_other_method(self): self.variable1 = something self.variable2 = something def sum(self): try: self.summation = self.variable1 + self.variable2 except: #Catch your exception here, for example in case some_other_method was not called yet def do_something_with_summation(self): print(self.summation) |
像这样的东西似乎是你想要的：
1 2 3 4 5 6 | class Something: def __init__(self): self.__sum(1, 2) def __sum(self, variable_1, variable_2): self.summation = sum(variable_1, variable_2) |
没有说这是一个理想的方法或任何事情，但你没有给我们太多的离开。
一般来说，确保