蟒类 - 函数变量范围

Question

我有以下Python代码：

class Geometry_2D: 
    def __init__(self, shape_name): 
     self.shape_name = shape_name 

class Polygon(Geometry_2D): 

    def __init__(self, shape_name, verticies_amount): 
     Geometry_2D.__init__(self, shape_name) 
     self.verticies_amount 

    def Adjust_verticies_amount(self): 
     self.verticies_amount += 1 

triangle = Polygon('triangle', 3) 
quadrilateral = triangle.Adjust_verticies_amount() 

这里我有一个可变verticies_amount其在Polygon类__init__函数来定义。我需要在Adjust_verticies_amount函数中使用verticies_amount变量。但是，这是不可能的，因为它们处于不同的范围。所以，我的quadrilateral = triangle.Adjust_verticies_amount()调用不起作用。

我应该怎么做才能正确？

Answer 1

你忘了把self.vertices_amount在初始化（）多边形

的方法

class Geometry_2D: 
    def __init__(self, shape_name): 
     self.shape_name = shape_name 

class Polygon(Geometry_2D): 
    def __init__(self, shape_name, verticies_amount): 
     Geometry_2D.__init__(self, shape_name) 
     self.verticies_amount = vertices_amount 

    def Adjust_verticies_amount(self): 
     self.verticies_amount += 1 

triangle = Polygon('triangle', 3) 
quadrilateral = triangle.Adjust_verticies_amount()