user1751547 user1751547 - 1 month ago 13
Python Question

Split Python Flask app into multiple files

I'm having trouble understanding how to split a flask app into multiple files.

I'm creating a web service and I want to split the api's into different files (AccountAPI.py, UploadAPI.py, ...), just so I don't have one huge python file.

I've read that you can do this with Blueprints, but I'm not entirely sure that route is the right one for me.

Ultimately I want to run one Main python file and include other files so that when it runs, they are considered one big file.

For example if I have Main.py and AccountAPI.py I want to be able to do this:

Main.py:

from flask import Flask
import AccountAPI

app = Flask(__name__)

@app.route("/")
def hello():
return "Hello World!"

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


AccountAPI.py:

@app.route("/account")
def accountList():
return "list of accounts"


I know with this example it obviously won't work, but is it possible to do something like that?

Thanks

Answer

Yes, Blueprints are the right way to do it. What you are trying to do can be achieved like this:

Main.py

from flask import Flask
from AccountAPI import account_api

app = Flask(__name__)

app.register_blueprint(account_api)

@app.route("/")
def hello():
    return "Hello World!"

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

AccountAPI.py

from flask import Blueprint

account_api = Blueprint('account_api', __name__)

@account_api.route("/account")
def accountList():
    return "list of accounts"

If this is an option, you might consider using different URL prefixes for the different APIs/Blueprints in order to cleanly separate them. This can be done with a slight modification to the above register_blueprint call:

app.register_blueprint(account_api, url_prefix='/accounts')

For further documentation, you may also have a look at the official docs.

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