'Simple Flask app runs but page will not load

So last night I closed terminal without closing my flask app or deactivating my venv. I think maybe this is the cause of the issue but none of my googling has yielded results.

When I run the flask app I get this in the terminal:

 * Serving Flask app "app" (lazy loading)
 * Environment: development
 * Debug mode: on
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 178-606-161

I have the following view function:

@app.route('/')
def index():
    return render_template('index.html')

When I try to load the page in a browser I just get a spinning icon. No error page. Nothing. Just a loading icon.

I am running the app inside my venv. I've tried deleting and recreating my venv. It was working fine yesterday, and with no changes it is now not working.

python flask

Solution 1:^[1]

Maybe you can change a port to run your app.I have encountered the same problem.Maybe the process of port 5000 is still in zombie state?

flask run --port=6000

Solution 2:^[2]

Changing the port didn't work. I ended up uninstalling and reinstalling Ubuntu. Worked fine after that.

Solution 3:^[3]

I had the same issue, possibly associated with Docker cleanup I did earlier. Running curl -i http://127.0.0.1:5000/ doesn't resolve, and port 6000 doesn't work for me, but using 5XXX fixed it:

flask run --port=5050

Solution 4:^[4]

It Happens to me once I mistakenly duplicate a callback function. So there were 2 callback functions for a single page that have the same inputs and outputs leading to the same situation.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	weijiang1994
Solution 2	JimmyCode
Solution 3	acute_triceratops
Solution 4	Kasun Vimukthi Jayalath

'Simple Flask app runs but page will not load

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Sources

Related Questions

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