在python中静态获取派生类名称

Question

How can i implement the static method get_class_name() to get the expected results.

I need to get the correct class name without instantiating. (I know this can be done with an instance). Python version is 2.6.

class base_class():
    @staticmethod
    def get_class_name():
        return <??>

class sub_classA(base_class):
    pass

class sub_classB(base_class):
    pass

print sub_classA.get_class_name() # should print 'sub_classA'
print sub_classB.get_class_name() # should print 'sub_classB'
print base_class.get_class_name() # should print 'base_class'

Answer 1

Make it a classmethod instead:

class base_class():
    @classmethod
    def get_class_name(cls):
        return cls.__name__

class sub_classA(base_class):
    pass

class sub_classB(base_class):
    pass

print sub_classA.get_class_name() # -> sub_classA
print sub_classB.get_class_name() # -> sub_classB
print base_class.get_class_name() # -> base_class

Of course you don't need a function/method to do this and could just access the __name__ class attribute directly:

print sub_classA.__name__ # -> sub_classA
# etc