Heroku Web Server Won't Start Locally

Question

I am having problems starting heroku web server localy. Here is the error message I am constantlly getting:

PS C:\Users\Dragan\heroku_workspace\python-getting-started> heroku local
[OKAY] Loaded ENV .env File as KEY=VALUE Format
10:01:32 web.1   |  Traceback (most recent call last):
10:01:32 web.1   |    File "c:\users\dragan\anaconda3\lib\runpy.py", line 170, in _run_module_as_main
10:01:32 web.1   |      "__main__", mod_spec)
10:01:32 web.1   |    File "c:\users\usr1\anaconda3\lib\runpy.py", line 85, in _run_code
10:01:32 web.1   |      exec(code, run_globals)
10:01:32 web.1   |    File 
C:\Users\Dragan\Anaconda3\Scripts\gunicorn.exe\__main__.py", line 5, in <module>
10:01:32 web.1   |    File "c:\users\dragan\anaconda3\lib\site-packages\gunicorn\app\wsgiapp.py", line 10, in <module>
10:01:32 web.1   |      from gunicorn.app.base import Application
10:01:32 web.1   |    File "c:\users\dragan\anaconda3\lib\site-packages\gunicorn\app\base.py", line 12, in <module>
10:01:32 web.1   |      from gunicorn import util
10:01:32 web.1   |    File "c:\users\dragan\anaconda3\lib\site-packages\gunicorn\util.py", line 9, in <module>
10:01:32 web.1   |      import fcntl
10:01:32 web.1   |  ImportError: No module named 'fcntl'
[DONE] Killing all processes with signal  null
10:01:33 web.1   Exited with exit code 1

I am following every step described in this tutorial LINK I installed the virtual environment inside the project 'python-getting-started'. I am trying to start the local web server from the project's root directory.

Can anybody help me resolve this issue?

UPDATE_1: I have installed Heroku Toolbelt for Windows, and I have installed Anaconda for Python.

Answer 1

According to the Heroku tutorial, try this in Windows instead of heroku local:

heroku local web -f Procfile.windows

https://devcenter.heroku.com/articles/getting-started-with-python#run-the-app-locally

Answer 2

You are trying to deploy a Python web application to Heroku using the gunicorn web server. This works great on Heroku, but CANNOT WORK on Windows because gunicorn only runs on *nix based operating systems.

What you can do instead of running heroku local is run your web server WITHOUT gunicorn locally. Simply say something like $ python myapp.py or whatever your main python web server file is. That will start your server locally using Python ONLY, and not gunicorn.