from flask import Flask, flash, get_flashed_messages

app = Flask(__name__)

app.debug = True

app.secret_key = 'abcdef'

@app.route('/get')

def get():

data = get_flashed_messages()

print(data)

return 'hello world'

@app.route('/set')

def set():

# 向某个地方设置一个值

flash('访问一次就设置一次')

return 'hello world'

if __name__ == '__main__':

app.run()