[▲ Vercel Community](/) · [Categories](/categories) · [Latest](/latest) · [Top](/top) · [Live](/live)

[Feedback](/c/feedback/8)

# Hosting a python server in Vercel

123 views · 0 likes · 3 posts


Anshroy2 (@anshroy2) · 2024-07-16

Very thankful for the [example](https://vercel.com/templates/python/flask-hello-world) and made my flask deployment process a lot easier. However, I started facing a lot of issues with package management..

When I went into the logs to check, the message is only limited to around 800 characters. Most of this message shows irrelevant information about AWS Lambda itself. If there could be a longer message in Vercel logs, that would've helped me a lot!

Example of something I was facing due to an outdated python package:
LAMBDA_WARNING: Unhandled exception. The most likely cause is an issue in the function code. However, in rare cases, a Lambda runtime update can cause unexpected function behavior. For functions using managed runtimes, runtime updates can be triggered by a function change, or can be applied automatically. To determine if the runtime has been updated, check the runtime version in the INIT_START log entry. If this error correlates with a change in the runtime version, you may be able to mitigate this error by temporarily rolling back to the previous runtime version. For more information, see https://docs.aws.amazon.com/lambda/latest/dg/runtimes-update.html
[ERROR] Runtime.ImportModuleError: Unable to import module 'vc__handler__python': cannot import name 'Mapping' from 'collections' (/var/lang/lib/python3.12/collections/__init__.py)
Traceback (most recent call last):


Pauline P. Narvas (@pawlean) · 2024-07-16

Hi @anshroy2!

I'm glad that the example has helped you deploy your app quicker 😄

Could you give me a bit more information on where you're seeing this error? From the message, it looks like an issue with an outdated Python package. Can you make sure everything is up-to-date?


system (@system) · 2026-01-19

Hi @anshroy2! 🙂

We haven't heard back from you. If you're still stuck, feel free to share any updates, logs, or additional context that might help us assist you better!