如下 Python代码用于画一个边长为100的正方形,横线处应填入的代码是?
import turtle
for i in range(4):
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turtle.done()
turtle.forward(100) turtle.left(90)
turtle.forward(100) turtle.left(180)
turtle.forward(100) turtle.right(180)
turtle.forward(100) turtle.left(45)