设计三个菜单，画多边形，画矩形，画椭圆python

以下是基于Python的三个菜单，分别用于绘制多边形、矩形和椭圆：

1. 绘制多边形：

import turtle

def draw_polygon():
    sides = int(input("请输入多边形的边数："))
    length = int(input("请输入每条边的长度："))
    
    pen = turtle.Turtle()
    for i in range(sides):
        pen.forward(length)
        pen.right(360/sides)
    
    turtle.done()

# 调用函数
draw_polygon()

2. 绘制矩形：

import turtle

def draw_rectangle():
    width = int(input("请输入矩形的宽度："))
    height = int(input("请输入矩形的高度："))
    
    pen = turtle.Turtle()
    for i in range(2):
        pen.forward(width)
        pen.right(90)
        pen.forward(height)
        pen.right(90)
    
    turtle.done()

# 调用函数
draw_rectangle()

3. 绘制椭圆：

import turtle

def draw_ellipse():
    a = int(input("请输入椭圆的长半轴："))
    b = int(input("请输入椭圆的短半轴："))
    
    pen = turtle.Turtle()
    pen.speed(10)
    for i in range(2):
        pen.circle(a, 90)
        pen.circle(b, 90)
    
    turtle.done()

# 调用函数
draw_ellipse()