python--slices

1. Slices:

>>> s= "Abcdefghi"

>>> S[1:7:2]#隔两个取
' BDF '

>>> s
' Abcdefghi '
>>> S[::-1]
' IHGFEDCBA '
>>> S[-1]
I
>>>

2. #用户输入的形式, output the last letter of each input string

A=raw_input ("Please input a string1:")
B=raw_input ("Please input a string2:")
C=raw_input ("Please input a string3:")
Print A[-1]+b[-1]+c[-1]

Output results

Please input a String1:hello
Please input a String2:python
Please input a string3:mysql
Onl
3. #用户输入三个单词,

#coding =utf-8

Def totalstr ():
S= ""
While 1:
A=raw_input ("Please input a string:")
If a== ".":
Break
Else
S+=A[-1]
Print S
Totalstr ()

4. #在txt文档中写中文的时候惯用写法:

Raw_input ("Please enter a word:". Decode ("Utf-8"). Encode ("GBK") 5. Bit operation:Move right 1 digits to divide the original number size by 2

Move left one means multiply the number size by 2

python--slices