A comparison of programming languages
Shell (LINUX), PHP (mostly Web page), Java and Python (common language)
Two ways to learn Python
1. Learn Grammar First
2. Then learn the module (most of the modules are written well, we just need to call it)
Output and input of three Python
1.print (Input)
The role of 1.1 + is to connect strings
1.2 Strings can be multiplied
2. Output
Raw_input (' hint message ') #可以和SHELL中的read-P ' hint info: ' Variable mutual understanding
Four operators
Standard operators: +,-, *,/,//(divisible)
Comparison operators: >=,>,<=,< = =,! = <> (also not equal)
Logical operators: And not OR
Five Python variables
Digital
String (must have quotation marks)
List (a variable can store multiple values) can be modified: [] example:a=[' A ', 1, ' B '] a[0]=33 (Modify) A.append (22) (ADD)
Tuples (multiple values can be stored in a variable) cannot be modified: ()
Dictionary (a variable can store multiple values) can be modified: {} a={' name ': ' Tom '} a[' name ']= ' CK ' (modified) a[' QQ ']=123456 (ADD)
Python Little Understanding
