摘要：
import turtle class Stack: def __init__(self): self.items = [] def isEmpty(self): return len(self.items) == 0 def push(self, item): self.items.append(item) d... 阅读全文
摘要：
import turtle import math turtle.pensize(1) turtle.up() turtle.left(90) turtle.forward(200) turtle.left(90) turtle.forward(300) turtle.down() turtle.color("red") turtle.begin_fill() for i in range(2)... 阅读全文
摘要：
https://www.jianshu.com/p/9d46029ada6c 阅读全文