FLASK_APP 变量即使在.env 中也不起作用

Question

I have installed python-dotenv==0.6.5

And I put FLASK_APP in .env file

DEBUG=True
FLASK_ENV=development
FLASK_APP=flasky.py

But it shows this error when I run flask run

Usage: flask run [OPTIONS]

Error: Could not locate Flask application. You did not provide the FLASK_APP environment variable.

For more information see http://flask.pocoo.org/docs/latest/quickstart/

But if I export FLASK_APP=flasky.py , it works well.

I also tried to put FLASK_APP=flasky.py in .flaskenv file, but I didn't work:(

All other env variables are loaded well. Thanks

Answer 1

The problem was FLASK version. I updated it using pip install --upgrade Flask Thanks!