Python画圣诞树

以下是使用Python绘制圣诞树的示例代码：

import turtle

# 设置画布和画笔
screen = turtle.Screen()
screen.bgcolor("black")
pen = turtle.Turtle()
pen.speed(0)
pen.color("green")

# 绘制圣诞树
def draw_tree():
    pen.penup()
    pen.goto(0, -200)
    pen.pendown()
    pen.setheading(90)
    pen.forward(200)
    draw_branch(100, 60)

def draw_branch(branch_length, angle):
    if branch_length < 10:
        pen.color("green")
    else:
        pen.color("brown")

    if branch_length > 5:
        pen.forward(branch_length)
        pen.right(angle)
        draw_branch(branch_length * 0.7, angle)
        pen.left(angle * 2)
        draw_branch(branch_length * 0.7, angle)
        pen.right(angle)
        pen.backward(branch_length)

draw_tree()

# 绘制雪花
def draw_snow():
    pen.penup()
    pen.goto(-248, -100)
    pen.pendown()
    pen.color("white")
    pen.pensize(2)
    for i in range(80):
        pen.goto(randint(-248, 248), randint(-100, 248))
        petal_number = 6
        snow_size = int(randint(2, 10))
        for j in range(petal_number):
            pen.forward(snow_size)
            pen.backward(snow_size)
            pen.right(360 / petal_number)

draw_snow()

turtle.done()