把显示的图片也显示出来

好的，我可以为您修改代码，让程序能够在绘制完毕后将图片显示出来。请使用以下代码：

绘制樱花：

import turtle
import random
from PIL import ImageGrab

# 设置画布大小和背景颜色
turtle.setup(width=800, height=600)
turtle.bgcolor("black")

# 定义绘制花朵的函数
def draw_flower(petal_num, petal_len, petal_width):
    turtle.color("white")
    for i in range(petal_num):
        turtle.begin_fill()
        turtle.circle(petal_len, 60)
        turtle.left(120)
        turtle.circle(petal_len, 60)
        turtle.end_fill()
        turtle.left(360/petal_num)
    turtle.color("pink")
    turtle.begin_fill()
    turtle.circle(20)
    turtle.end_fill()

# 随机生成樱花的位置和大小
for i in range(20):
    x = random.randint(-400, 400)
    y = random.randint(-300, 300)
    petal_num = random.randint(5, 10)
    petal_len = random.randint(50, 100)
    petal_width = random.randint(5, 15)

    # 移动画笔到指定位置
    turtle.penup()
    turtle.goto(x, y)
    turtle.pendown()

    # 绘制樱花
    draw_flower(petal_num, petal_len, petal_width)

# 隐藏画笔
turtle.hideturtle()

# 保存图片并显示图片
img = ImageGrab.grab()
img.show()

# 点击窗口关闭画布
turtle.exitonclick()

绘制玫瑰：

import turtle
from PIL import ImageGrab

# 设置画布大小和背景颜色
turtle.setup(width=800, height=600)
turtle.bgcolor("black")

# 定义绘制花朵的函数
def draw_flower(petal_num, petal_len, petal_width, petal_color):
    turtle.color(petal_color)
    turtle.begin_fill()
    for i in range(petal_num):
        turtle.circle(petal_len, 60)
        turtle.left(120)
        turtle.circle(petal_len, 60)
        turtle.left(360/petal_num)
    turtle.end_fill()
    turtle.color("green")
    turtle.begin_fill()
    turtle.circle(petal_width)
    turtle.end_fill()

# 设置画笔初始位置和颜色
turtle.penup()
turtle.goto(0, -200)
turtle.color("red")

# 绘制玫瑰的花瓣
turtle.pendown()
draw_flower(15, 100, 10, "red")

# 绘制玫瑰的花心
turtle.penup()
turtle.goto(0, -100)
turtle.pendown()
turtle.color("yellow")
turtle.begin_fill()
turtle.circle(20)
turtle.end_fill()

# 隐藏画笔
turtle.hideturtle()

# 保存图片并显示图片
img = ImageGrab.grab()
img.show()

# 点击窗口关闭画布
turtle.exitonclick()

希望这次的修改能够满足您的需求。如果您还有其他问题，欢迎随时提出。