Flaskr tutorial ModuleNotFoundError No module named Flaskr

Question

I am going through the flask tutorial up to the Test Coverage section. And after finishing writing all the test files listed in the tutorial documentation I get the following error.

ImportError while loading conftest '/home/Desktop/flask_tutoriel/tests/conftest.py'.
tests/conftest.py:5: in <module>
    from flaskr import create_app
E   ModuleNotFoundError: No module named 'flaskr'

1. Could you help me understand why this error? Because the module is as you can see in the project tree image.

Project Tree

Conftest.py

import os
import tempfile

import pytest
from flaskr import create_app
from flaskr.db import get_db, init_db

with open(os.path.join(os.path.dirname(__file__), 'data.sql'), 'rb') as f:
    _data_sql = f.read().decode('utf8')


@pytest.fixture
def app():
    db_fd, db_path = tempfile.mkstemp()

    app = create_app({
        'TESTING': True,
        'DATABASE': db_path,
    })

    with app.app_context():
        init_db()
        get_db().executescript(_data_sql)

    yield app

    os.close(db_fd)
    os.unlink(db_path)


@pytest.fixture
def client(app):
    return app.test_client()


@pytest.fixture
def runner(app):
    return app.test_cli_runner()

class AuthActions(object):
    def __init__(self, client):
        self._client = client

    def login(self, username='test', password='test'):
        return self._client.post(
            '/auth/login',
            data={'username': username, 'password': password}
        )

    def logout(self):
        return self._client.get('/auth/logout')


@pytest.fixture
def auth(client):
    return AuthActions(client)

Tree of the test folder

 tests
    ├── conftest.py
    ├── data.sql
    ├── __pycache__
    │   └── conftest.cpython-39-pytest-7.1.1.pyc
    ├── test_auth.py
    ├── test_blog.py
    ├── test_db.py
    └── tests_factory.py

Answer 1

That means that you haven't installed the module. Try uninstalling the package using pip uninstall flaskr then re-installing it with pip install -e .

Answer 2

I cannot explain why but this worked for me.

python -m pytest

It was found here

I hope it helps.