How to use flask in python

How to use flask in python, in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

First, install flask

Second, familiar with hello world, on the code

From flask import Flaskapp = Flask (_ _ name__) app.debug = True@app.route ('/') def index (): return 'Hello World'if _ _ name__ = =' _ main__': app.run ()

Description: the first line is to reference flask

Address jump, go to the code

From flask import Flask,session, redirect Url_forapp = Flask (_ _ name__) app.debug = True@app.route ('/') def index (): if 'username' in session: return' Logged in as% s' else: return redirect (url_for ('login')) @ app.route (' / hello') def hello (): return 'Hello World'@app.route (' / login') def login (): return 'You are not logged in'if _ name__ = ='_ _ main__': app.run ()

Note: index method will determine whether a user has logged in, and will not jump to login login. Add return before jumping to the address, otherwise an error will be reported

Fourth, reference other class methods, on the code

From flask import Flask,session, redirect Url_forimport testapp = Flask (_ _ name__) app.debug = True@app.route ('/ myword') def myword (): ww = test.myWord () return ww@app.route ('/') def index (): if 'username' in session: return' Logged in as% s' else: return redirect (url_for ('login')) @ app.route (' / hello') def hello (): return' Hello World'@app.route ('/ login') def login (): return 'You are not logged in'if _ _ name__ =' _ _ main__': app.run ()

Note: refer to other classes through import, and then output the content returned by the corresponding method through return, otherwise an error will be reported

This is the answer to the question on how to use flask in python. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.