flask中的session和g全局变量

#_*_ encoding: utf-8 _*_   @author: ty  hery   2019/12/20

from  flask import  Flask, session, current_app, g
# g 是临时的本App里面的变量对象,通过对象的方法保存数据 如 g.username='张三',常用与一个请求之内的多个函数之间传递变量参数
# from werkzeug.routing import BaseConverter
import json
app = Flask(__name__)
app.config['SECRET_KEY'] = 'asdfsdafsdaf134561sdaf'
#  flask的session必须设置秘钥字符串:SECRET_KEY,否则报错RuntimeError: The session is unavailable
# because no secret key was set.  Set the secret_key on the application to something unique and secret.

# flask 默认把session保存到了cookie中
@app.route('/login',methods=['GET','POST'])
def login():
    # 设置session数据
    session['name'] = 'python'
    session['mobile'] = '18611111111'
    g.username = 'zhangsan'
    say_hello()
    return 'login success'

# @app.route('')
def say_hello():
    username = g.username
    print(g.username,'撒大防守打法')
    pass

@app.route('/index')
def index():
    # 获取session数据
    name = session.get('name')
    return 'hello {}'.format(name)

if __name__ == '__main__':
    print('--哈哈01--',app.url_map,'--哈哈01--')
    app.run(debug=True)