字符串练习：
http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html
取得校园新闻的编号
news = ‘http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html‘
print(news[-14:-5])
https://docs.python.org/3/library/turtle.html
产生python文档的网址
newshead=‘https://docs.python.org/3/library/‘
newsend=‘.html‘
print(newshead+str(‘turtle‘)+newsend)
http://news.gzcc.cn/html/xiaoyuanxinwen/4.html
产生校园新闻的一系列新闻页网址
news1=‘http://news.gzcc.cn/html/xiaoyuanxinwen/‘
news2=‘.html‘
for i in range(10):
news3=news1+str(i)+news2
print(news3)
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
news = ‘http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html‘
print(news.rstrip(‘.html‘).split(‘_‘)[1])
用函数统计一歌词中单词出现的次数
song=‘‘‘I‘ve been reading books of old
The legends and the myths
Achilles and his gold
Hercules and his gifts
Spiderman‘s control
And Batman with his fists
And clearly I don‘t see myself upon that list
She said where‘d you wanna go
How much you wanna risk
I‘m not looking for somebody
With some Superhuman gifts
Some Superhero
Some fairytale bliss
Just something I can turn to
Somebody I can kiss
I want something just like this
Doo doo doo doo doo doo
Doo doo doo doo doo
Doo doo doo doo doo doo
Oh I want something just like this
Doo doo doo doo doo doo
Doo doo doo doo doo
Doo doo doo doo doo doo
Oh I want something just like this
I want something just like this
I‘ve been reading books of old
The legends and the myths
The testaments they told
The moon and its eclipse
And Superman unrolls
A suit before he lifts
But I‘m not the kind of person that it fits
She said where‘d you wanna go
How much you wanna risk
I‘m not looking for somebody
With some Superhuman gifts
Some Superhero
Some fairytale bliss
Just something I can turn to
Somebody I can miss
I want something just like this
I want something just like this
Oh I want something just like this
Doo doo doo doo doo doo
Doo doo doo doo doo
Doo doo doo doo doo doo
Oh I want something just like this
Doo doo doo doo doo doo
Doo doo doo doo doo
Doo doo doo doo doo doo
Where‘d you wanna go
How much you wanna risk
I‘m not looking for somebody
With some Superhuman gifts
Some Superhero
Some fairytale bliss
Just something I can turn to
Somebody I can kiss
I want something just like this
Oh I want something just like this
Oh I want something just like this
Oh I want something just like this
‘‘‘
print(‘some在歌曲里一共出现了‘+ str(song.count(‘some‘)) +‘次‘)
将字符串分解成一个个的单词。
str=‘Whered you wanna goHow much you wanna risk‘
print(str.split())