蟒類 - 函數變量範圍

Question

我有以下Python代碼：

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() 

這裏我有一個可變verticies_amount其在Polygon類__init__函數來定義。我需要在Adjust_verticies_amount函數中使用verticies_amount變量。但是，這是不可能的，因爲它們處於不同的範圍。所以，我的quadrilateral = triangle.Adjust_verticies_amount()調用不起作用。

我應該怎麼做才能正確？

Answer 1

你忘了把self.vertices_amount在初始化（）多邊形

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()