Python基础(四)分行树绘制demo

1 五角星绘制

"""

五角星绘制

龟库turtle

"""

import turtle

def main():

"""

主函数

"""

# 计数器

count = 1

while count <= 5:

turtle.forward(100)

turtle.right(144)

count = count + 1

turtle.exitonclick()

if __name__ == '__main__':

main()

2 不同大小的五角星绘制

详情：https://docs.python.org/3.0/library/turtle.html

"""

不同大小五角星绘制

"""

import turtle

def draw_pentagram(size):

"""

绘制五角星

"""

# 计数器

count = 1

while count <= 5:

turtle.forward(size)

turtle.right(144)

count += 1

def main():

"""

主函数

"""

turtle.penup()

turtle.backward(200)

turtle.pendown()

turtle.pensize(2)

turtle.pencolor('red')

size = 40

while size <= 200:

# 调用函数

draw_pentagram(size)

size += 40

turtle.exitonclick()

if __name__ == '__main__':

main()

3 五角星绘制

"""

递归函数应用

"""

import turtle

def draw_recursive_pentagram(size):

"""

迭代绘制五角星

"""

# 计数器

count = 1

while count <= 5:

turtle.forward(size)

turtle.right(144)

count += 1

# 五角星绘制完成，更新参数

size += 30

if size <= 150:

draw_recursive_pentagram(size)

def main():

"""

主函数

"""

turtle.penup()

turtle.backward(200)

turtle.pendown()

turtle.pensize(2)

turtle.pencolor('blue')

size = 30

draw_recursive_pentagram(size)

turtle.exitonclick()

if __name__ == '__main__':

main()

4 分形树绘制

"""

分形树绘制

"""

import turtle

def draw_branch(branch_length):

"""

绘制分形树

"""

if branch_length > 5:

# 绘制右侧树枝

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

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(150)

turtle.pendown()

turtle.color('brown')

draw_branch(80)

turtle.exitonclick()

if __name__ == '__main__':

main()

5 分形树绘制

加入图中代码

感谢小象