https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896360
I have problems installing flask_socketio (when running flask, I get "ModuleNotFoundError: No module named 'flask_socketio'"). I tried setting FLASK_DEBUG=0 (apparently that worked for someone I read) and tried uninstalling and re-installing (re-installing when installed just gives me a bunch of "Requirement already satisfied"). I set up a brand new virtual environment and if it helps below is my pip freeze and the complete error. Am using python version 3.6.8. (Apologies- I'm a beginner,so maybe there is too much or incomplete info..) Click==7.0 dnspython==1.16.0 eventlet==0.25.1 Flask==1.1.1 Flask-SocketIO==4.2.1 greenlet==0.4.15 itsdangerous==1.1.0 Jinja2==2.11.1 MarkupSafe==1.1.1 monotonic==1.5 pkg-resources==0.0.0 python-engineio==3.11.2 python-socketio==4.4.0 six==1.14.0 Werkzeug==0.16.1 --------------------------------------------------------------------------------------- (py2) anna@DESKTOP-CD69S60:/mnt/c/git/project2$ flask run * Serving Flask app "application.py" * Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead. * Debug mode: off Usage: flask run [OPTIONS] Error: While importing "application", an ImportError was raised: Traceback (most recent call last): File "/home/anna/.local/lib/python3.6/site-packages/flask/cli.py", line 240, in locate_app __import__(module_name) File "/mnt/c/git/project2/application.py", line 4, in <module> from flask_socketio import SocketIO, emit ModuleNotFoundError: No module named 'flask_socketio'