no SQLAlchemy module in Flask-SQL

Question

I have tried both

from flask.ext.sqlalchemy import SQLAlchemy

and

from flask_sqlalchemy import SQLAlchemy

inside flask/esk I only have a __init__.py and a __init__.pyc, and inside flask_sqlalchemy I only have _compat.py, _coompat.pyc, __init__.py and __init__.pyc. Should I copy the SQLAlchemy package in to one of these directories? I read here that ext is deprected so I'm unsure.

stack-overflow deprected flask ext

I'm getting these errors

ImportError: No module named flask_sqlalchemy

and

ImportError: No module named flask.ext.sqlalchemy

I installed with pip

Answer 1

Flask-SQLAlchemy doesn't come with Flask. You need to install it. You are correct, flask.ext is deprecated, but all it is is a "shortcut" for accessing other installed packages that are Flask extensions. Since you haven't installed Flask-SQLAlchemy, you can't import it.

$ pip install flask-sqlalchemy

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It is bad practice to manually install libraries to the system Python location (sudo pip). Use a virtualenv.