在OOP中，有什么方法可以在另一种方法中使用一种方法吗？

Question

我试图使用OOP在Python中创建一个乌龟程序，但是我无法在另一个方法中调用一个方法。我想在设计方法中调用平方方法。

import turtle
my_turtle = turtle.Turtle()

class Circle:

   def __init__(self,length,angle,speed,angle_turn):

      self.length = length
      self.angle = angle
      self.speed = speed
      self.angle_turn = angle_turn

   def square(self):

      for i in range(4):

         my_turtle.speed(self.speed)
         my_turtle.forward(self.length)
         my_turtle.left(self.angle)

   def design(self):

      for i in range(60):

         square()
         my_turtle.right(self.angle_turn)

Answer 1

我会这样重构您的代码

import turtle

class Circle:

   def __init__(self,length,angle,speed,angle_turn):

      self.length = length
      self.angle = angle
      self.speed = speed
      self.angle_turn = angle_turn
      self.my_turtle = turtle.Turtle()

   def square(self):

      for i in range(4):

         self.my_turtle.speed(self.speed)
         self.my_turtle.forward(self.length)
         self.my_turtle.left(self.angle)

   def design(self):

      for i in range(60):

         self.square()
         self.my_turtle.right(self.angle_turn)

这样，您的课程就不再依赖于外部变量my_turtle。