# -*- coding: utf-8 -*-
# @Time    : 18-9-14 下午3:23
# @Author  : Felix Wangimport turtle
import mathdef p_line(t, n, length, angle):"""Draws n line segments."""for i in range(n):t.fd(length)t.lt(angle)def polygon(t, n, length):"""Draws a polygon with n sides."""angle = 360 / np_line(t, n, length, angle)def arc(t, r, angle):"""Draws an arc with the given radius and angle."""arc_length = 2 * math.pi * r * abs(angle) / 360n = int(arc_length / 4) + 1step_length = arc_length / nstep_angle = float(angle) / n# Before starting reduces, making a slight left turn.t.lt(step_angle / 2)p_line(t, n, step_length, step_angle)t.rt(step_angle / 2)def petal(t, r, angle):"""Draws a 花瓣 using two arcs."""for i in range(2):arc(t, r, angle)t.lt(180 - angle)def flower(t, n, r, angle, p):"""Draws a flower with n petals."""for i in range(n):petal(t, r, angle)t.lt(p / n)def leaf(t, r, angle, p):"""Draws a 叶子 and fill it."""t.begin_fill()  # Begin the fill process.
    t.down()flower(t, 1, r, angle, p)t.end_fill()def main():window = turtle.Screen()  # creat a screenwindow.bgcolor("white")window.title("draw a flower")lucy = turtle.Turtle()lucy.shape("turtle")lucy.color("red")lucy.width(3)# lucy.speed(10)# Drawing flowerflower(lucy, 7, 60, 100, 360)# Drawing pedicellucy.color("brown")lucy.rt(90)lucy.fd(200)# Drawing leaf 1lucy.width(1)lucy.rt(270)lucy.color("green")leaf(lucy, 40, 80, 180)lucy.rt(140)lucy.color("black")lucy.fd(30)lucy.lt(180)lucy.fd(30)# Drawing leaf 2lucy.rt(120)lucy.color("green")leaf(lucy, 40, 80, 180)lucy.color("black")lucy.rt(140)lucy.fd(30)lucy.ht()  # hideturtle
    window.exitonclick()main()