Sixty-one: Flask.Session the flask operating session

1, disposed session: use the dictionary flask.session can operate as the operation mode and operating the dictionary: the session [ 'Key'] = value
2, obtaining the session, and obtain the value of the dictionary as: session [ 'key'], session. GET ( 'Key')
. 3, remove the value of the session: and deleting dictionary values as
　　session.pop (key): delete the specified value
　　del session [key]: Deletes the specified value
　　Session.clear (): delete all the session value
4, set the session valid: If you do not set the validity period, the default browser is closed after the failure, if you set session.permanent = True then expire in 31 days, if you want to specify the validity period, by configuring the realization (to be set session.permanent = True), provided as two hours after the expiration: app.config [ 'PERMANENT_SESSION_LIFETIME'] = timedelta (hours = 2)

1, disposed session: use the dictionary flask.session can operate, the operation mode of operation and a dictionary: session [ 'key'] = value

import os
from flask import Flask, session

app = Flask(__name__)
app.config['SECRET_KEY'] = os.urandom(30)


@app.route('/')
def index():
    session['username'] = 'xxxxxxxxxxxx'
    return 'hello world'

2, obtaining the session, and obtain the value of the dictionary as: session [ 'key'], session.get ( 'key')

import os
from flask import Flask, session

app = Flask(__name__)
app.config['SECRET_KEY'] = os.urandom(30)


@app.route('/get_session/')
def get_session():
    username = session.get('username', '没有获取到username')
    return f'获取的session为：{username}'

3, delete the value in the session: delete the specified session or delete the contents of all of the information session

OS Import 
from the Flask Flask Import, the session 

App = the Flask (__ name__) 
the app.config [ 'of SECRET_KEY'] = os.urandom (30) 


@ app.route ( '/ delete_session /') 
DEF delete_session (): 
    session.pop ( ' username ') # delete the contents of the specified session in the 
    # session.clear () # remove everything session of 
    return' deleted successfully '

4, set the session's validity

OS Import 
from the Flask Flask Import, the session 

App = the Flask (__ name__) 
the app.config [ 'of SECRET_KEY'] = os.urandom (30) 


@ app.route ( '/') 
DEF index (): 
    the session [ 'username'] = 'xxxxxxxxxxxx' 
    session.permanent # default = True False, if set to True, it will store 31 days 
    return 'hello world'

Specified expiration time

Sixty-one: Flask.Session the flask operating session

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