字符串、组合数据类型练习

字符串练习:

http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html

取得校园新闻的编号

 

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

  

https://docs.python.org/3/library/turtle.html

产生python文档的网址

 

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

  

http://news.gzcc.cn/html/xiaoyuanxinwen/4.html

产生校园新闻的一系列新闻页网址

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

  

 

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

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

  

用函数统计一歌词中单词出现的次数

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'))

  

将字符串分解成一个个的单词。

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

2.组合数据类型练习

分别定义字符串,列表,元组,字典,集合,并进行遍历。

字符串

string='Michael'
for str in string:
    print(str)

列表

list=['Michael','Tracy','Bob','wangwu']
for l in list:
    print(l)

元祖

tuple=('Michael','Tracy','Bob','wangwu')
for tup in tuple:
    print(tup)

字典

dict = dict(zip('python', '123456'))
for i in dict:
    print(i)
for i in dict.keys():
    print(i)
for i in dict.values():
    print(i)
for i in dict.items():
    print(i)

集合

set={'Michael','Tracy','Bob','wangwu'}
for i in set:
        print(i)

  

总结列表,元组,字典,集合的联系与区别。

 

 

posted @ 2018-03-20 22:18  192邓锦秀  阅读(118)  评论(0编辑  收藏  举报