使用Python的turtle模块绘制樱花树的代码示例

import turtle as T
import random

# 绘制樱花树的函数，参数为树枝长度和绘图海龟对象
def draw_tree(trunk_length, turtle_obj):
    if trunk_length > 3:
        # 根据树枝长度决定颜色和粗细
        if 8 <= trunk_length <= 12:
            color = 'snow' if random.randint(0, 1) == 0 else 'lightcoral'
            turtle_obj.pensize(trunk_length / 3)
        elif trunk_length < 8:
            color = 'snow' if random.randint(0, 1) == 0 else 'lightcoral'
            turtle_obj.pensize(trunk_length / 2)
        else:
            color = 'sienna'
            turtle_obj.pensize(trunk_length / 10)
        turtle_obj.color(color)  # 设置颜色
        turtle_obj.forward(trunk_length)  # 向前画树枝
        angle_a = 20 * random.random()  # 随机角度a
        turtle_obj.right(angle_a)  # 向右转
        branch_reduction = 10 * random.random()  # 随机减少量
        draw_tree(trunk_length - branch_reduction, turtle_obj)  # 递归画子树枝
        turtle_obj.left(2 * angle_a)  # 向左转
        draw_tree(trunk_length - branch_reduction, turtle_obj)  # 递归画子树枝
        turtle_obj.right(angle_a)  # 回转角度a
        turtle_obj.penup()  # 提起笔
        turtle_obj.backward(trunk_length)  # 向后画树枝
        turtle_obj.pendown()  # 放下笔

# 绘制樱花花瓣的函数，参数为花瓣数量和绘图海龟对象
def draw_petals(petal_count, turtle_obj):
    for _ in range(petal_count):
        turtle_obj.penup()  # 提起笔
        distance = 200 - 400 * random.random()  # 随机花瓣落下的距离
        turtle_obj.forward(distance)  # 向前移动
        turtle_obj.left(90)  # 转向
        turtle_obj.forward(10 - 20 * random.random())  # 随机花瓣大小
        turtle_obj.down()  # 放下笔
        turtle_obj.color('lightcoral')  # 设置花瓣颜色
        turtle_obj.begin_fill()  # 开始填充颜色
        turtle_obj.circle(1)  # 画一个圆形花瓣
        turtle_obj.end_fill()  # 结束填充颜色
        turtle_obj.penup()  # 提起笔
        turtle_obj.backward(distance)  # 向后移动
        turtle_obj.right(90)  # 转向

# 初始化绘图环境
turtle_obj = T.Turtle()
turtle_screen = turtle_obj.getscreen()
turtle_screen.bgcolor("wheat")  # 设置背景颜色为小麦色
turtle_obj.hideturtle()  # 隐藏海龟图标
turtle_obj.speed(0)  # 设置绘制速度为最快
turtle_obj.left(90)  # 转向
turtle_obj.penup()  # 提起笔
turtle_obj.backward(150)  # 向后移动
turtle_obj.pendown()  # 放下笔
turtle_obj.color("sienna")  # 设置画笔颜色为赭色

# 绘制樱花树和花瓣
draw_tree(60, turtle_obj)
draw_petals(200, turtle_obj)

# 点击窗口关闭程序
turtle_screen.exitonclick()