Using a shared variable between routes and main in flask

Question

I have a python flask server. In the main of my script, I get a variable from user that defines the mode of my server. I want to set this variable in main (just write) and use it (just read) in my controllers. I am currently using os.environ, but I 'm searching for more flasky way to use.

I googled and tried following options:

flask.g: it is being reset for each request; so, I can't use it inside controllers when it is being set somewhere else.
flask.session: it is not accessible outside request context and I can't set it in the main.
Flask-Session: like the second item, I can't set it in the main.

Yes @furas, you are correct. But I'm searching for a way to do it by `flask` methods and objects if possible. — Zeinab Abbasimazar, Dec 15 '19 at 09:06
as for me `flask/django/PHP` method is to keep data in database. If `main` doesn't have access to `flask` then database or file can be solution. But now I'm wondering what if you set `app.variable = value` or how flask use `app.config` — furas, Dec 15 '19 at 09:15
I will try your suggestions @furas and let you know of the results. Thanks. — Zeinab Abbasimazar, Dec 15 '19 at 10:41
Dear @furas, both `app.config["mode"]` and `app.mode` worked. Would you please add it as an answer? — Zeinab Abbasimazar, Dec 15 '19 at 10:48

score 1 · Accepted Answer · answered Dec 15 '19 at 11:28

1

In main you use app.run() so app is avaliable in main. It should be also avaliable all time in all functions so you can try to use

app.variable = value

but flask has also

app.config

to keep any settings. See doc: Configuration Handling

answered Dec 15 '19 at 11:28

furas

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Using a shared variable between routes and main in flask

1 Answers1