[Python] Connecting flask shell

I am new to Flask. I have started small project using python==3.10, Flask==2.3.3, flask-shell==0.1.8, flask-sqlalchemy==3.1.1.\

My directory:

├── app
│ ├── config.py
│ ├── service
│ │ └── db
│ │ └── models.py
│ └── wsgi.py
├── .flaskenv
├── docker-compose.yaml
├── poetry.lock
└── pyproject.toml


wsgi.py

def create_app() -> Flask:
app = Flask(__name__)
app.config.from_object(DevelopmentConfig())
db.init_app(app)
with app.app_context():
db.create_all()
swagger = Swagger(app)
return app


.flaskenv

FLASK_APP="app/wsgi:create_app"
FLASK_ENV="development"


When I try to connect to flask shell

(.venv) dverh@LAPTOP-FUCJJ30R:/mnt/c/Users/dverh/spbu-practice-web$ flask shell


I get an error:

Traceback (most recent call last):
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/bin/flask", line 8, in <module>
sys.exit(main())
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/flask/cli.py", line 1063, in main
cli.main()
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/click/core.py", line 1078, in main
rv = self.invoke(ctx)
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/click/core.py", line 1688, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/click/core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/click/decorators.py", line 33, in new_func
return f(get_current_context(), *args, **kwargs)
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/flask/cli.py", line 357, in decorator
return __ctx.invoke(f, *args, **kwargs)
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/mnt/c/Users/dverh/spbu-practice-web/.venv/lib/python3.10/site-packages/flask_shell.py", line 79, in shell_command
app.env,
AttributeError: 'Flask' object has no attribute 'env'


But I can't understand what is attribute 'env' and if what I've done is right.

When i downgraded flask-shell to 0.1.3 (5 years apart), i was able to connect. I find difference between flask_shell.py 0.1.3

from flask.globals import _app_ctx_stack
app = _app_ctx_stack.top.app
banner = 'Python %s on %s\nApp: %s%s\nInstance: %s' % (
sys.version,
sys.platform,
app.import_name,
app.debug and ' [debug]' or '',
app.instance_path,
)


and flask_shell.py 0.1.8

from flask.globals import _app_ctx_stack
app = _app_ctx_stack.top.app
banner = 'Python %s on %s\nApp: %s%s\nInstance: %s' % (
sys.version,
sys.platform,
app.import_name,
app.env,
app.instance_path,
)


As I understood the FLASK_ENV variable gives us the possibility to control whether to allow DEBUG or not.

But then the question is why I have such an error, because I've specified it at .flaskenv

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