帮我用Python画个玫瑰花

当然可以，以下是Python代码：

import turtle

def draw_petal(t, r, angle):
    """绘制花瓣"""
    for i in range(2):
        t.circle(r, angle)
        t.left(180-angle)

def draw_flower(t, n, r, angle):
    """绘制花朵"""
    for i in range(n):
        draw_petal(t, r, angle)
        t.left(360/n)

def draw_stem(t, height):
    """绘制花茎"""
    t.right(90)
    t.forward(height)

def draw_leaf(t, height, width):
    """绘制叶子"""
    t.right(135)
    t.forward(height)
    t.right(135)
    t.forward(width)
    t.right(135)
    t.forward(height)

def main():
    # 初始化画布
    t = turtle.Turtle()
    t.speed(0)
    t.hideturtle()
    t.penup()
    t.goto(0, -200)
    t.pendown()

    # 绘制花朵
    draw_flower(t, 10, 100, 20)

    # 绘制花茎
    draw_stem(t, 200)

    # 绘制叶子
    t.right(90)
    draw_leaf(t, 50, 30)
    t.left(90)
    draw_leaf(t, 50, 30)

    # 关闭画布
    turtle.done()

if __name__ == '__main__':
    main()

运行以上代码，即可在画布上绘制出一朵玫瑰花。