How to share the global app object in flask?

Question

I am using flask and trying to the following.

I have defined a main.py file through which I want to run my app ie python main.py -

from flask import Fla         


        

Answer 1

Regarding import and use of current_app from flask in a "helper" python function in a separate source file, this works as long as a current app context has already been set up (E.g. web request received). I have a case where, during application initialization (app.run not yet invoked), app.logger is invoked in the helper function.

Before I fixed it (see below), I got a stack trace punctuated by "RuntimeError: Working outside of application context".

Sample solution:
main.py:

import helper
...
app = Flask(__name__.split('.')[0],
        template_folder="templates",
        static_folder="static")
... 
# Fix: Create an app context
with app.app_context():
    helper.dbopen(...)
...
app.run(...)

helper.py:

from flask import current_app as app
...
def dbopen():
    app.logger.info(...)
    ...