python基础综合练习

impo sys
print(sys.argv)
import turtle
turtle.bgcolor('red')
turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.setup(600,400,0,0)

def moveto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

def print(n):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(n)
        turtle.right(144)
    turtle.end_fill()

moveto(-260,120)
turtle.begin_fill()
for i in range(5):
    turtle.forward(120)
    turtle.right(144)
turtle.end_fill()

moveto(-120,160)
turtle.left(31)
print(40)
turtle.setheading(0)

moveto(-80,130)
turtle.left(-18)
print(40)
turtle.setheading(0)

moveto(-80,70)
turtle.left(0)
print(40)


moveto(-120,20)
turtle.left(31)
print(40)
turtle.hideturtle()
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'))