CODEWITHSUNDEEP
pythonflask
Akhil K Nambiar
Akhil K Nambiar

Reputation: 3975

Specify Routes in Flask

I'm creating Restful web services using Flask. From the examples I see we use annotations like

@app.route('/')

I wanted to know how I use this if I have two Classes. I tried moving that to a different file inside a package but then it gives me a 404 error.

Contents of Service.py

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello World!'

Contents of Flask.py

from flask import Flask

app = Flask(__name__)

if __name__ == '__main__':
    app.run()

I just want to know how do I specify routes if they are in different classes.

Upvotes: 1

Views: 2457

Answers (1)

davidism
davidism

Reputation: 127180

Do not define app in both modules. Only define it in one place and import it everywhere else. In the module that defines app, import your other modules after defining it, to avoid circular imports.

A basic structure for a Flask project looks like:

MyProject/
    my_package/
        __init__.py
        service.py
    run.py

MyProject/my_package/__init__.py

from flask import Flask

app = Flask(__name__)

from my_project import service

MyProject/my_package/service.py

from my_project import app


@app.route('/')
def hello_world():
    return 'Hello, World!'

MyProject/run.py

from my_package import app

app.run('localhost', debug=True)

Use python run.py from the MyProject directory to run the application with the dev server.

You also have some terminology errors. They're called "decorators", not "annotations". They're called "modules", not "classes". Also, common practice is to give files lowercase names.

Upvotes: 2

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