1 impo sys 2 print(sys.argv) 3 import turtle 4 turtle.bgcolor('red') 5 turtle.color('yellow') 6 turtle.fillcolor('yellow') 7 turtle.setup(600,400,0,0) 8 9 def moveto(x,y): 10 turtle.up() 11 turtle.goto(x,y) 12 turtle.down() 13 14 def print(n): 15 turtle.begin_fill() 16 for i in range(5): 17 turtle.forward(n) 18 turtle.right(144) 19 turtle.end_fill() 20 21 moveto(-260,120) 22 turtle.begin_fill() 23 for i in range(5): 24 turtle.forward(120) 25 turtle.right(144) 26 turtle.end_fill() 27 28 moveto(-120,160) 29 turtle.left(31) 30 print(40) 31 turtle.setheading(0) 32 33 moveto(-80,130) 34 turtle.left(-18) 35 print(40) 36 turtle.setheading(0) 37 38 moveto(-80,70) 39 turtle.left(0) 40 print(40) 41 42 43 moveto(-120,20) 44 turtle.left(31) 45 print(40) 46 turtle.hideturtle() 47 turtle.done()
运行结果图如下：
网址：
http://news.gzcc.cn/html/2017/xiaoyuanxinwe
n_1027/8443.html
取得校园新闻的编号
str1='http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html' print(str1[-9:-5])
运行结果如下：
网址：
https://docs.python.org/3/library/turtle.ht
ml
产生python文档的网址
str2='https://docs.python.org/3/library/turtle.html' print(str2.replace("turtle","python"))
运行结果：
网址：
http://news.gzcc.cn/html/xiaoyuanxinwen/4.h
tml
产生校园新闻的一系列新闻页网址
add3='http://news.gzcc.cn/html/xiaoyuanxinwen/' add4='.html' for i in range(4): result=add3+str(i)+add4 print(result)
练习字符串内建函数：
strip,lstrip,rstrip,split,count
用函数得到校园新闻编号
str5='http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html' print(str5.split('_',2)[1].rstrip('.html'))
用函数统计一歌词中单词出现的次数
str=“Sometimes it's hard to define If falling stars are hiding in your eyes Just watching you made me cry Cause now I know you'll never ever get off my mind I never thought all those beautiful words can't describe A little of your kindness, a bit of your light There's nothing I can't give up for your smile Whatever it takes, I'll make it alright. ” print(str.count('I'))