Python Automation Development-[first day]-basic data types and encodings

1. Python vs. Other languages

-C-Language interpretation code--machine-to-computer

-high-level languages such as python,java,php code---bytecode---machine----computer

2. Coding

-ASCII

1.ASCII only supports English 256, Chinese is not supported

-Unicode (Universal code)

1.unicode at least 16 people, Chinese and English at least 16 people

-Utf-8

1.utf-8 Chinese 3 bytes, 24 bits, English 1 bytes, 8 bits

-gbk/gbk2312

1.GBK is Chinese 2 bytes

Notice:python interpreter encoding, python3.* default encoding is Utf-8

3. Variables

A. Variables generally consist of letters, numbers, and underscores

B. Cannot start with a number

C. You cannot use some built-in commands as variables

D. Declaring variables using _ (underline) to differentiate words, or use hump

4. Comments

A. Single-line comment #

#!/usr/bin/python#print (' Hello Dragon ')

B. Multi-line comment "" "" ""

#!/usr/bin/python#! -*-coding:utf-8-*-"" "Print (' Hello Dragon ') print (' Hello Dragon ') print (' Hello Dragon ')" ""

6. List

Python automation Development-[first day]-basic data type and encoding