Question

我有一个classex.py文件：

class Class1:
    def method1():
        print 'stack1'
    def method2():
        print 'over1'
    def method3():
        print 'flow1'

class Class2:
    def method1():
        print 'stack2'
    def method2():
        print 'over2'
    def method3():
        print 'flow2'

class Class3:
    def method1():
        print 'stack3'
    def method2():
        print 'over3'
    def method3():
        print 'flow3'

我想访问classex文件类，所以我将导入该文件，以便在各种类中访问。

例如：

import classex
print Class1.method1()
print Class2.method2()

我的预期输出为stack1和over2

Answer 1

class Class1:
    def method1(self): # instance  is passed implicity as first arg
        print 'stack1'
    def method2(self):
        print 'over1'
    def method3(self):
        print 'flow1'

class Class2:
    def method1(self):
        print 'stack2'
    def method2(self):
        print 'over2'
    def method3(self):
        print 'flow2'

class Class3:
    def method1(self):
        print 'stack3'
    def method2(self):
        print 'over3'
    def method3(self):
        print 'flow3'

>>> import classex
>>> c = classex.Class1() # instance of Class1
>>> c.method1()
stack1

Answer 2

您实际上并没有导入Classes本身，而只是导入模块。

import classex

要访问您必须执行的课程：

>>> myclass = classex.Class1()
>>> myclass2 = classex.Class2()
>>> myclass.method1()
stack1
>>> mycalss2.Class2.method2()
over2

或直接导入课程：

>>> from classex import Class1, Class2
>>> myclass = Class1()
>>> myclass2 = Class2()
>>> myclass.method1()
stack1
>>> myclass2.method2()
over2

Answer 3

或者你可以这样做

class Class1:
    @classmethod
    def method1(clss):
        print 'stack1'
    @classmethod
    def method2(clss):
        print 'over1'
    @classmethod
    def method3(clss):
        print 'flow1'

class Class2:
    @classmethod
    def method1(clss):
        print 'stack2'
    @classmethod
    def method2(clss):
        print 'over2'
    @classmethod
    def method3(clss):
        print 'flow2'

class Class3:
    @classmethod
    def method1(clss):
        print 'stack3'
    @classmethod
    def method2(clss):
        print 'over3'
    @classmethod
    def method3(clss):
        print 'flow3'

然后

import classex

classex.Class1.method2()

等

但是你所做的并不能让我觉得你很了解OOP原则，或者你是从另一种具有某种类方法之王的OOP语言中得到的，而你期望获得同样的结果。 OO的Python实现与Java或C＃等略有不同，因此请务必阅读一些关于如何在Python中定义方法的内容。

python中的类中的类

3 个答案: