python

字符串格式化： “{0} love {1}.{2}”.format("I","pumz","com") '{0:.1f}{1}'.format(27.658,'GB')//冒号后面就为格式化字符 >>>'27.7GB' >>> b = 'I Love You Man' >>> b = list(b)//将字符串变成字符串 >>> b

['I', ' ', 'L', 'o', 'v', 'e', ' ', 'Y', 'o', 'u', ' ', 'M', 'a', 'n']

>>> b = tuple(b)//转换为元组 >>> b ('I', ' ', 'L', 'o', 'v', 'e', ' ', 'Y', 'o', 'u', ' ', 'M', 'a', 'n')

>>> 

>>> len(b)//返回长度值 14

>>>

>>> a = [1,2,3,4,5,6] >>> max(a)//返回序列或者参数的最大值/min()则相反·注意数据类型必须统一

6

sum(iterable[,start = 0])//返回序列iterable和可选参数start的总和 >>> sum(a)//不同的数据类型将会出错 21

>>> 

>>> sorted(number) [-97, 0, 2, 4, 5, 5, 7, 32, 43, 221, 323] >>> reversed(number)

<list_reverseiterator object at 0x0000022A4B76E2E8>

>>> list(reversed(number))//注意此用法

[221, 32, 323, 5, 7, 5, 4, 2, 43, 0, -97]

>>> list(enumerate(number))//每个元素前面加入了索引值 [(0, -97), (1, 0), (2, 43), (3, 2), (4, 4), (5, 5), (6, 7), (7, 5), (8, 323), (9, 32), (10, 221)] >>>