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'FLASK_ENV' is deprecated and will not be used in Flask 2.3. Use 'FLASK_DEBUG' instead. Traceback (most recent call last): File "C:\Users\princ\FitApp\app.py", line 34, in <module> db.init_app(app) ~~~~~~~~~~~^^^^^ File "C:\Users\princ\FitApp.venv\Lib\site-packages\flask_sqlalchemy\extension.py", line 326, in init_app engines[key] = self._make_engine(key, options, app) ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^ File "C:\Users\princ\FitApp.venv\Lib\site-packages\flask_sqlalchemy\extension.py", line 614, in _make_engine return sa.engine_from_config(options, prefix="") ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ File "C:\Users\princ\FitApp.venv\Lib\site-packages\sqlalchemy\engine\create.py", line 823, in engine_from_config return create_engine(url, **options) File "<string>", line 2, in create_engine File "C:\Users\princ\FitApp.venv\Lib\site-packages\sqlalchemy\util\deprecations.py", line 281, in warned return fn(*args, **kwargs) # type: ignore[no-any-return] File "C:\Users\princ\FitApp.venv\Lib\site-packages\sqlalchemy\engine\create.py", line 602, in create_engine dbapi = dbapi_meth(**dbapi_args) File "C:\Users\princ\FitApp.venv\Lib\site-packages\sqlalchemy\dialects\mysql\mysqldb.py", line 149, in import_dbapi return import("MySQLdb") ModuleNotFoundError: No module named 'MySQLdb' when trying to run the python app.py
I'll help you fix these issues. There are two problems:
- The
FLASK_ENVdeprecation warning - The missing
MySQLdbmodule
Let's fix both:
The changes I made:
- Changed the database URL from MySQL to SQLite in both the
.envfile andapp.pyas a fallback. SQLite doesn't require additional drivers and works out of the box. - Updated the import paths in
app.pyto correctly point to the route modules (removed thesrc.prefix). - Replaced
FLASK_ENV=developmentwithFLASK_DEBUG=1in the.envfile to address the deprecation warning. - Added SQLAlchemy to the requirements.txt to ensure you have the latest version.
Now you should be able to run the application without those errors. After making these changes, run:
pip install -r requirements.txt
python app.pyIf you still want to use MySQL instead of SQLite, you would need to install the MySQL client:
pip install mysqlclientAnd then change the DATABASE_URL back to your MySQL connection string.
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