序列类型函数

len()#返回元素个数，

max()#最大字符（字典序）

min()#最小字符（字典序）

sum()#求和

reversed():#字典序排列

list():浅拷贝创建新列表

tuple()：浅拷贝创建新元组

>>> s1=['name',"they're",'age','The','Ta']
>>> for t in reversed(s1):
　　　　print t

Ta
The
age
they're
name

>>> sorted(s1)
['Ta', 'The', 'age', 'name', "they're"]

enumerate()#序列号

>>> s=['age','number','name']
>>> for i,s in enumerate(s):
　　　　print i,s

0 age
1 number
2 name

zip（）#组合

>>> help(zip)
Help on built-in function zip in module __builtin__:

zip(...)
zip(seq1 [, seq2 [...]]) -> [(seq1[0], seq2[0] ...), (...)]

Return a list of tuples, where each tuple contains the i-th element
from each of the argument sequences. The returned list is truncated
in length to the length of the shortest argument sequence.

>>> s=['name','age','number']
>>> s1=['Tim','555','123']
>>> for i,j in zip(s,s1):
　　　　print ('%s %s'%(i,j))

Name Tim
Age 555
Number 123