Using python-magic in a lambda

Question

Hi, 
I'm trying to run a python lambda function. I'm using the zip deployment. I want to be able to run my code in python 3.9.

The function runs fine using python 3.7 runtime, however when I set the runtime to python 3.9 it fails it gives the error:

"Unable to import module 'lambda_function': failed to find libmagic.  Check your installation".

I followed the instructions given in this stack overflow post: https://stackoverflow.com/questions/61921935/aws-lambda-failed-to-find-libmagic.

I added a copy of libmagic.so.1 to a directory called lib in the code. However it still gave the same error message. Any help would be appreciated.

Answer

Given that the function runs correctly under Python 3.7 but doesn't when you change the runtime I suspect that there are some components in the ZIP which are not compatible with Python 3.9. Rebuild the entire ZIP from scratch using Python 3.9 on your source machine and then upload the new ZIP to Lambda.

Answer

Convert you lambda in SAM template.  and test it on  you system.
SAM local invoke  --events

Answer

Some have found success here: https://stackoverflow.com/questions/61921935/aws-lambda-failed-to-find-libmagic . I found it working switching to the 3.7 runtime

Using python-magic in a lambda

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