python - When should Flask.g be used? - Stack Overflow
2013年2月26日 · I saw that g will move from the request context to the app context in Flask 0.10, which made me confused about the intended use of g. My understanding (for Flask 0.9) is that: g lives in the request context, i.e., created afresh when the requests starts, and available until it …
What is the g object in this Flask code? - Stack Overflow
g is an object provided by Flask. It is a global namespace for holding any data you want during a single app context. For example, a before_request handler could set g.user, which will be accessible to the route and other functions.
python - How to use g.user global in flask - Stack Overflow
2012年11月29日 · As I understand the g variable in Flask, it should provide me with a global place to stash data like holding the current user after login. Is this correct? I would like my navigation to display my user's name, once logged in, across the site. My views contain. from Flask import g #among other things During login, I assign
python - Flask G variable Simple example - Stack Overflow
2018年5月4日 · Flask g is available in application context and lasts for the lifetime of the request. What is application context? As cited on Application Context Page, flask app is in many states while being executed. One of the design ideas behind Flask is that there are two different “states” in which code is executed.
python - Flask: 'session' vs. 'g'? - Stack Overflow
2015年10月2日 · g data is not persisted between requests. session gives you a place to store data per specific browser. As a user of your Flask app, using a specific browser, returns for more requests, the session data is carried over across those requests. g on the other hand is data shared between different parts of your code base within one request cycle.
How to persist elements in the Flask g context - Stack Overflow
2021年6月16日 · If it helps: I am running Flask inside Tornado with something like this: http_server = HTTPServer( WSGIContainer(app), ... ) http_server.listen(5000) IOLoop.instance().start() But I am not even reaching this part of the code, so I don't think Tornado is affecting the behaviour of Flask or g.
python - What's the difference between current_app and g context ...
2016年11月30日 · g is a special object that is unique for each request. It is used to store data that might be accessed by multiple functions during the request. The connection is stored and reused instead of creating a new connection if get_db is called a second time in the same request. more: When should Flask.g be used?
Preserving global state in a flask application [duplicate]
I am trying to save a cache dictionary in my flask application. As far as I understand it, the Application Context, in particular the flask.g object should be used for this. Setup: import flask as f app = f.Flask(__name__) Now if I do: with app.app_context(): f.g.foo = "bar" print f.g.foo It prints bar. Continuing with the following:
Unable to use flask.g to access variables in other functions
2014年4月7日 · I would like to shed a bit more light on the use of g global in storing data. g only stores data for the lifetime of a request and for any subsequent redirections to another route. Afterwards the g global is set back to null. This means whatever was set in g in one request can't be accessed during another request. Use sessions to store data ...
Why can't I use flask.g after a request comes? - Stack Overflow
2017年7月18日 · According to the Flask 0.12 docs: flask.g..... Starting with Flask 0.10 this is stored on the application context and no longer on the request context which means it becomes available if only the application context is bound and not yet a request. As far as I know, when a request comes, a application context will be created, if there isn't one.