Pycharm开发环境设置与熟悉。
练习基本输入输出：
print(‘你好,{}.‘.format(name))
uprint(sys.argv)
库的使用方法：
import ...
from ... import ...
条件语句：
if (abs(pos()))<1:
break
循环语句：
for i in range(5):
while True:
函数定义：
def mygoto(x,y):
def drawjx(r):
综合练习：画一面五星红旗，将代码与运行截图发布博客交作业。
import time import turtle import os def draw_rectangle(start_x, start_y, rec_x, rec_y): turtle.goto(start_x, start_y) turtle.color(‘red‘) turtle.fillcolor(‘red‘) turtle.begin_fill() for i in range(2): turtle.forward(rec_x) turtle.left(90) turtle.forward(rec_y) turtle.left(90) turtle.end_fill() def draw_star(center_x, center_y, radius): turtle.setpos(center_x, center_y) # find the peak of the five-pointed star pt1 = turtle.pos() turtle.circle(-radius, 72) pt2 = turtle.pos() turtle.circle(-radius, 72) pt3 = turtle.pos() turtle.circle(-radius, 72) pt4 = turtle.pos() turtle.circle(-radius, 72) pt5 = turtle.pos() # draw the five-pointed star turtle.color(‘yellow‘, ‘yellow‘) turtle.fill(True) turtle.goto(pt3) turtle.goto(pt1) turtle.goto(pt4) turtle.goto(pt2) turtle.goto(pt5) turtle.fill(False) # start the project turtle.speed(5) turtle.penup() # draw the rectangle star_x = -320 star_y = -260 len_x = 660 len_y = 440 draw_rectangle(star_x, star_y, len_x, len_y) # draw the big star pice = 660 / 30 big_center_x = star_x + 5 * pice big_center_y = star_y + len_y - pice * 5 turtle.goto(big_center_x, big_center_y) turtle.left(90) turtle.forward(pice * 3) turtle.right(90) draw_star(turtle.xcor(), turtle.ycor(), pice * 3) # draw the small star turtle.goto(star_x + 10 * pice, star_y + len_y - pice * 2) turtle.left(turtle.towards(big_center_x, big_center_y) - turtle.heading()) turtle.forward(pice) turtle.right(90) draw_star(turtle.xcor(), turtle.ycor(), pice) # draw the second star turtle.goto(star_x + pice * 12, star_y + len_y - pice * 4) turtle.left(turtle.towards(big_center_x, big_center_y) - turtle.heading()) turtle.forward(pice) turtle.right(90) draw_star(turtle.xcor(), turtle.ycor(), pice) # draw the third turtle.goto(star_x + pice * 12, star_y + len_y - 7 * pice) turtle.left(turtle.towards(big_center_x, big_center_y) - turtle.heading()) turtle.forward(pice) turtle.right(90) draw_star(turtle.xcor(), turtle.ycor(), pice) # draw the final turtle.goto(star_x + pice * 10, star_y + len_y - 9 * pice) turtle.left(turtle.towards(big_center_x, big_center_y) - turtle.heading()) turtle.forward(pice) turtle.right(90) draw_star(turtle.xcor(), turtle.ycor(), pice) turtle.ht() time.sleep(3) os._exit(1)
