python字符串简单操作

获取用户输入：

>>> input("the meaning of life:")
the meaning of life:42
42

>>> x = input("x:")
x:2
>>> y = input("y:")
y:3
>>> print x*y
6

 字符串分片：

>>> number = [1,2,3,4,5,6,7,8,9,0]
>>> number[3:6]
[4, 5, 6]

显示所有：

>>> number = [1,2,3,4,5,6,7,8,9,0]
>>> number[:]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

 步长为2的分片：

>>> number = [1,2,3,4,5,6,7,8,9,0]
>>> number[::2]
[1, 3, 5, 7, 9]

检查是否在字符串内包含：

>>> a = 'p' in 'python'
>>> print a
True