To Gunicorn or to Poetry, That is The Question

Learn when to run your Python API with Gunicorn vs Poetry. Discover setup commands, performance tips, and best practices for Flask APIs.


This content originally appeared on HackerNoon and was authored by hackernoon

I have a Python API that uses Flask as the framework. I have a server where I have the code. I can run the API from Poetry or Gunicorn

\

When to Start the server using Gunicorn

In case you need ==concurrency and high performance==, use this command. This method is used for production environment

go to API_BDG folder and execute:

export $(grep -v '^#' ../.env | xargs) && gunicorn -w <WORKERS_QTY> -b <SERVER_IP>:<SERVER_PORT> app:app

This command is composed of 2 parts connected with && which means that the second command is executed if the first is successful.

\ The first part of the command is:

export $(grep -v '^#' ../.env | xargs)

Where:

  • grep -v '^#' filters out the commented lines from environment variables

  • xargs: takes the remaining lines and converts them into a single line suitable for export.

  • export $(...): sets those variables in the current shell environment so they’re accessible to processes started afterward.

\ The Second part of the command is:

gunircorn -w <WORKERS_QTY> -b <SERVER_IP>:<SERVER_PORT> app:app

Where:

  • -w <WORKERS_QTY> is a flag to set the number of workers to run the app

  • -b <SERVER_IP>:<SERVER_PORT> binds server IP to a port

  • app:app means “from the file app.py, import the object named app”—which is usually a Flask or FastAPI app instance.

    \

Start the server using Poetry

In case concurrency and high performance are not necessary, use this commands. It runs API DBG using Flask (single thread)

go to API_BDG folder and execute:

poetry shell
poetry run python3 src/app.py

It looks simpler and it easier to remember. So I not have to take care of concurrency and high performance I use this.

\ What are your thoughts of this? when do you prefer Gunicorn or Poetry? Do you have other preferred ways to run the APIs?

Lets share opinions and keep going forward!


This content originally appeared on HackerNoon and was authored by hackernoon


Print Share Comment Cite Upload Translate Updates
APA

hackernoon | Sciencx (2025-07-16T05:28:21+00:00) To Gunicorn or to Poetry, That is The Question. Retrieved from https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/

MLA
" » To Gunicorn or to Poetry, That is The Question." hackernoon | Sciencx - Wednesday July 16, 2025, https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/
HARVARD
hackernoon | Sciencx Wednesday July 16, 2025 » To Gunicorn or to Poetry, That is The Question., viewed ,<https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/>
VANCOUVER
hackernoon | Sciencx - » To Gunicorn or to Poetry, That is The Question. [Internet]. [Accessed ]. Available from: https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/
CHICAGO
" » To Gunicorn or to Poetry, That is The Question." hackernoon | Sciencx - Accessed . https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/
IEEE
" » To Gunicorn or to Poetry, That is The Question." hackernoon | Sciencx [Online]. Available: https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/. [Accessed: ]
rf:citation
» To Gunicorn or to Poetry, That is The Question | hackernoon | Sciencx | https://www.scien.cx/2025/07/16/to-gunicorn-or-to-poetry-that-is-the-question/ |

Please log in to upload a file.



There are no updates yet.
Click the Upload button above to add an update.

You must be logged in to translate posts. Please log in or register.

Related Posts