Python basics _ character encoding and binary, user interaction, python Interaction

Python basics _ character encoding and binary, user interaction, python Interaction

Character encoding

ASCII-supports 255 characters

Gb2312 -- supports more than seven thousand Chinese Characters

Gbk-supports over 20 thousand Chinese Characters

Gb18030 -- supports more than 20 thousand Chinese Characters

UTF-8 -- can automatically adjust the size, English only occupies 1 byte, Chinese occupies 3 byte

The python3 interpreter uses UTF-8 encoding to process files by default.

The Python2 interpreter uses the ASCII character encoding method by default.

Note

Single line comment :#

Multi-line comment: either ''' or "appears in pairs.

Print multiple rows with 3 single quotes or 3 multiple quotes

1 info = ''' 2 name: Lily 3 age: 22 4 adr: fj 5 ''' 6 print (info) 7 8 Results: 9 name: Lily10 age: 2211 adr: fj

Print multiple rows

Single or double quotation marks can be used to print a single line. The printed characters must contain single quotation marks.

User input

The default input data is str by default.

For Python 2, raw_input is used.

In pyhton3

1 name = input ("name:") 2 age = input ("age:") 3 print ("personal information:", name, age) 4 result: 5 name: lily6 age: 227 personal information: Lily 22

User input

Name = input ("name:") age = input ("age:") info = ''' ------ info is ''' + name + ''' ------ name: ''' + name + ''' age: ''' + age + ''' print (info) name: Lilyage: 20 ------ info is Lily ------ name: lilyage: 20 ps: Multiple blocks of memory will be opened, not recommended

User input (+ connector)

Name = input ("name:") age = input ("age:") info = ''' ------ info is % s ------ name: % sage: % s ''' % (name, name, age) print (info) Result: name: Lilyage: 10 ------ info is Lily ------ name: Lilyage: 10

User input (% s placeholder)

Name = input ("name:") age = input ("age:") info1 = ''' ------ info is {_ name} ------ name: _ nameage: _ age '''. format (_ name = name, _ age = age) print (info1) info2 = ''' ------ info is {0} ------ # {0} is not objective name: {0} age: {1 }'''. format (name, age) print (info2) Result: name: kuage: 99 ------ info is ku ------ name: _ nameage: _ age ------ info is ku ------ name: kuage: 99

User input (. format)

Import Module

Import getpass

import getpassname = input("My name is ",)pwd = getpass.getpass("login paaaword")print(name,pwd)