Python從父級靜態方法調用子靜態變量

Question

我該如何做到這一點？

class Parent: 
    Foo = 'Parent food' 

    @staticmethod 
    def bar(): 
     # want to print whatever the child's Foo is 


class Child(Parent): 
    Foo = 'Child foo' 


# This should print "Child foo" 
Child.bar() 

Answer 1

您可以使用該

class Parent: 
    Foo = 'Parent food' 

    @classmethod 
    def bar(cls): 
     print cls.Foo 

class Child(Parent): 
    Foo = 'Child foo' 


Child.bar() 
# This will print "Child foo" 

Answer 2

正如在評論中提到的，你需要的是一個類方法。

class Parent: 
    Foo = 'Parent food' 

    @classmethod 
    def bar(cls): 
     print(cls.Foo)