`flask run` error running Python 3.6.4 on the flask team project

[ainsleymcgrath]

Here's the error I get when running flask run after installing all the requirements and setting up a venv.

`(venv)

ainsleymcgrath @ MacBook-Pro in ~/Documents/dev/tso/CodingWorkshops/problems/webdev/flask_team_project on git:master x [19:15:22] C:1

$ flask run
Traceback (most recent call last):
File "/usr/local/bin/flask", line 11, in
sys.exit(main())
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 478, in main
cli.main(args=args, prog_name=name)
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 345, in main
return AppGroup.main(self, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/decorators.py", line 64, in new_func
return ctx.invoke(f, obj, *args[1:], **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 388, in run_command
app = DispatchingApp(info.load_app, use_eager_loading=eager_loading)
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 124, in init
self._load_unlocked()
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 148, in _load_unlocked
self._app = rv = self.loader()
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 209, in load_app
rv = locate_app(self.app_import_path)
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 89, in locate_app
import(module)
File "/Users/ainsleymcgrath/Documents/dev/tso/CodingWorkshops/problems/webdev/flask_team_project/app.py", line 2, in
from flask_debugtoolbar import DebugToolbarExtension
ModuleNotFoundError: No module named 'flask_debugtoolbar'`

After this, I tried omitting all references to flask-debugtoolbar I got a similar error.

$ flask run Traceback (most recent call last): File "/usr/local/bin/flask", line 11, in <module> sys.exit(main()) File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 478, in main cli.main(args=args, prog_name=name) File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 345, in main return AppGroup.main(self, *args, **kwargs) File "/usr/local/lib/python3.6/site-packages/click/core.py", line 697, in main rv = self.invoke(ctx) File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1066, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/local/lib/python3.6/site-packages/click/core.py", line 895, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/local/lib/python3.6/site-packages/click/core.py", line 535, in invoke return callback(*args, **kwargs) File "/usr/local/lib/python3.6/site-packages/click/decorators.py", line 64, in new_func return ctx.invoke(f, obj, *args[1:], **kwargs) File "/usr/local/lib/python3.6/site-packages/click/core.py", line 535, in invoke return callback(*args, **kwargs) File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 388, in run_command app = DispatchingApp(info.load_app, use_eager_loading=eager_loading) File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 124, in __init__ self._load_unlocked() File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 148, in _load_unlocked self._app = rv = self.loader() File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 209, in load_app rv = locate_app(self.app_import_path) File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 89, in locate_app __import__(module) File "/Users/ainsleymcgrath/Documents/dev/tso/CodingWorkshops/problems/webdev/flask_team_project/app.py", line 6, in <module> import meetup.api ModuleNotFoundError: No module named 'meetup' (venv)

My Python was installed using homebrew, and other than that I don't think there's anything notable about my setup.

[tathagata]

Hey @aiiins thanks a lot for taking time to report the issue.
I tried the steps on 3.6.1, and was not able to reproduce the issue.
My guess is your flask command is to pointing to a different script from a previous installation of flask that was probably done without creating a virtual environment. So when you run flask run, it is still points to the previous one. Try this

$ which flask

For the flask run command to work it should point to the flask script inside the venv/bin/ folder, where venv is the directory created once you did python -m venv venv.
For example, in my machine

 (venv) t (7) flask_team_project $ which flask 
 /Users/t/CodingWorkshops/problems/webdev/flask_team_project/venv/bin/flask

Try running this instead, and see if you are getting expected result

(venv) t (7) venv/bin/flask run