python画一个圣诞树

以下是Python代码，用于绘制一个圣诞树：

import turtle

# 设置画布和画笔
canvas = turtle.Screen()
canvas.bgcolor("#003366")
pen = turtle.Turtle()
pen.speed(0)
pen.color("white")

# 绘制树干
pen.penup()
pen.goto(-50, -200)
pen.pendown()
pen.setheading(90)
pen.forward(200)

# 绘制树枝
def draw_tree(branch_len, angle):
    if branch_len > 5:
        pen.forward(branch_len)
        pen.right(angle)
        draw_tree(branch_len - 15, angle)
        pen.left(angle*2)
        draw_tree(branch_len - 15, angle)
        pen.right(angle)
        pen.backward(branch_len)

pen.penup()
pen.goto(0, -150)
pen.pendown()
pen.color("green")
draw_tree(100, 30)

# 绘制圣诞球
pen.penup()
pen.goto(-70, -50)
pen.pendown()
pen.color("red")
pen.begin_fill()
pen.circle(20)
pen.end_fill()

pen.penup()
pen.goto(70, -50)
pen.pendown()
pen.color("gold")
pen.begin_fill()
pen.circle(20)
pen.end_fill()

# 绘制星星
pen.penup()
pen.goto(0, 100)
pen.pendown()
pen.color("yellow")
pen.begin_fill()
for i in range(5):
    pen.forward(50)
    pen.right(144)
pen.end_fill()

# 隐藏画笔
pen.hideturtle()

# 显示画布
canvas.mainloop()

运行代码后，将会看到一个绚丽多彩的圣诞树，如下所示：