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- import turtle
- def draw_branch(branch_length):
- """
- 绘制分形树
- """
- if branch_length > 5:
- # 绘制右侧的树枝
- turtle.forward(branch_length)
- print('向前', branch_length)
- turtle.right(20)
- print('右转', 20)
- draw_branch(branch_length - 15)
- # 绘制左侧树枝
- turtle.left(40)
- print('左转', 40)
- draw_branch(branch_length - 15)
- # 返回之前的树枝上
- turtle.right(20)
- print('右转', 20)
- turtle.backward(branch_length)
- print('向后', branch_length)
- def main():
- """
- 主函数
- """
- turtle.left(90)
- turtle.penup()
- turtle.backward(500)
- turtle.pendown()
- draw_branch(100)
- turtle.exitonclick()
- if __name__ == '__main__':
- main()
复制代码
这是报错:
in main turtle.left(90) AttributeError: module 'turtle' has no attribute 'left'
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