Question

I’m trying to declare static variable and now my code is:

class StaticClass:
    varA = 'hello'

    @staticmethod
    def staticMethod():
        varA='bye'

Result of code below is hello. Why not ‘bye’ ?

StaticClass.staticMethod()

print StaticClass.varA

Answer 1

The code in staticMethod() assigns the string bye to the local variable varA, then returns, dropping the local variable. An assignment inside a function always creates local variables in Python. A staticmethod in Python has no means of accessing the class at all — you need a classmethod for this purpose:

class StaticClass:
    var_a = 'hello'

    @classmethod
    def cls_method(cls):
        cls.var_a = 'bye'