How to divide flask app into multiple py files

Question

My flask application currently consists of a single test py file with multiple routes and the main   route defined  Is there some way I could create a test2 py file that contains routes that were not handled in test py    app route   somepath   def somehandler          Handler code here   I am concerned that there are too many routes in test py and would like to make it such that I can run python test py  which will also pick up the routes on test py as if it were part of the same file  What changes to I have to make in test py and or include in test2 py to get this to work

User · Answer

You can use simple trick which is import flask app variable from main inside another file, like:

test-routes.py

from __main__ import app

@app.route('/test', methods=['GET'])
def test():
    return 'it works!'

and in your main files, where you declared flask app, import test-routes, like:

app.py

from flask import Flask, request, abort

app = Flask(__name__)

# import declared routes
import test-routes

It works from my side.

User · Answer

You can use the usual Python package structure to divide your App into multiple modules  see the Flask docs   However      Flask uses a concept of blueprints for making application components and supporting common patterns within an application or across applications    You can create a sub-component of your app as a Blueprint in a separate file   simple page   Blueprint  simple page     name    template folder  templates    simple page route    lt page gt    def show page         stuff   And then use it in the main part   from yourapplication simple page import simple page  app   Flask   name    app register blueprint simple page    Blueprints can also bundle specific resources  templates or static files  Please refer to the Flask docs for all the details

User · Answer

I would like to recommend flask-empty at GitHub   It provides an easy way to understand Blueprints  multiple views and extensions

User · Answer

Dividing the app into blueprints is a great idea  However  if this isn t enough  and if you want to then divide the Blueprint itself into multiple py files  this is also possible using the regular Python module import system  and then looping through all the routes that get imported from the other files   I created a Gist with the code for doing this   https   gist github com Jaza 61f879f577bc9d06029e  As far as I m aware  this is the only feasible way to divide up a Blueprint at the moment  It s not possible to create  sub-blueprints  in Flask  although there s an issue open with a lot of discussion about this   https   github com mitsuhiko flask issues 593  Also  even if it were possible  and it s probably do-able using some of the snippets from that issue thread   sub-blueprints may be too restrictive for your use case anyway - e g  if you don t want all the routes in a sub-module to have the same URL sub-prefix

User · Answer

This task can be accomplished without blueprints and tricky imports using Centralized URL Map  app py  import views from flask import Flask  app   Flask   name     app add url rule      view func views index  app add url rule   other   view func views other   if   name         main         app run debug True  use reloader True    views py  from flask import render template  def index        return render template  index html    def other        return render template  other html

[python] How to divide flask app into multiple py files?

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