字符串练习

str=‘http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html‘
print(str[-14:-5])

str="https://docs.python.org/3/library/"+"turtle"+".html"
print(str)

for i in range(5):
    print(‘http://news.gzcc.cn/html/xiaoyuanxinwen/{ }.html‘.format(i))

str=‘http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html‘
print(str.strip(‘.html‘).split(‘_‘)[1])

str=‘‘‘I‘m a big big girl
　　In a big big world
　　It‘s not a big big thing if you leave me
　　But I do do feel
　　that I too too will miss you much
　　Miss you much.
I can see the first leaf falling
　　It‘s all yellow and nice
　　It‘s so very cold outside
　　Like the way I‘m feeling inside
　　I‘m a big big girl
　　In a big big world
　　It‘s not a big big thing if you leave me
　　But I do do feel
　　that I too too will miss you much
　　Miss you much.
Outside it‘s now raining
　　And tears are falling from my eyes
　　Why did it have to happen
　　Why did it all have to end
　　I‘m a big big girl
　　In a big big world
　　It‘s not a big big thing if you leave me
　　But I do do feel
　　that I too too will miss you much
　　Miss you much.
I have your arms around me ooooh like fire
　　But when I open my eyes
　　You‘re gone.
I‘m a big big girl
　　In a big big world
　　It‘s not a big big thing if you leave me
　　But I do do feel
　　that I too too will miss you much
　　Miss you much.
I‘m a big big girl
　　In a big big world
　　It‘s not a big big thing if you leave me
　　But I do feel that will miss you much
　　Miss you much.‘‘‘
print(str.count(‘big‘))

str=‘long time no see‘
print(str.split())