Flask not starting upon execution of app.py :

[ram2210]

Hi there,

When I try to execute the file "app.py", the following happens and I get an error. Please could someone shed some light on this and how I can get past it?

Thanks,
Ram

Error message:

• Serving Flask app "main" (lazy loading)
• Environment: production
  WARNING: This is a development server. Do not use it in a production deployment.
  Use a production WSGI server instead.
• Debug mode: on
• Restarting with stat
  An exception has occurred, use %tb to see the full traceback.

SystemExit: 1
C:\ProgramData\Anaconda3\envs\py3-TF2.0\lib\site-packages\IPython\core\interactiveshell.py:2890: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.
warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1)

[Anjum20-a]

Hi there,

When I try to execute the file "app.py", the following happens and I get an error. Please could someone shed some light on this and how I can get past it?

Thanks,
Ram

Error message:

• Serving Flask app "main" (lazy loading)
• Environment: production
  WARNING: This is a development server. Do not use it in a production deployment.
  Use a production WSGI server instead.
• Debug mode: on
• Restarting with stat
  An exception has occurred, use %tb to see the full traceback.

SystemExit: 1
C:\ProgramData\Anaconda3\envs\py3-TF2.0\lib\site-packages\IPython\core\interactiveshell.py:2890: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.
warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1)

Hey
Try naming the file something else instead of app.py . It worked for me.

[Rahul-Gothwal]

@ram2210
it's working fine
just try changing your virtual environment.

and don't run it on jupyter notebook if you are.

[wakeupcoders]

@ram2210 Yes Ram everything is working fine. Have you tried with proper environment and libraries?
Also, Use this Link as your reference. It will work fine.

[shreyasGarud]

@ram2210
It is always good to create to create virtual environment while working on any project.

Checkout this link to know how to create virtual environment :
https://uoa-eresearch.github.io/eresearch-cookbook/recipe/2014/11/26/python-virtual-env/

Then,

1. Activate virtual environment.
2. Go to the project directory and run command "pip freeze". This will generate the list of all required libraries with their respective versions.
3. Now copy and paste that list in ".txt" file. Eg. requirements.txt
4. Finally, run command "pip install -r requirements.txt".

Hope your app will run fine !