AWS can't import Python greenlet module

Question

I created an AWS lambda with Python 3.6, which uses an external library not already in the AWS env. Once deployed with serverless, I call the handler and it gives me the error:

START RequestId: 123456 Version: $LATEST
Unable to import module 'my_handler': No module named 'greenlet._greenlet'

END RequestId: 123456
REPORT RequestId: 123456    Duration: 0.35 ms   Billed Duration: 1 ms   Memory Size: 1024 MB    Max Memory Used: 191 MB Init Duration: 1591.04 ms

I have a requirements.txt file where I'm trying to get gevent and greenlet right from source, since I read Linux can't manage these binary files. Looks like this:

gevent @ git+git://github.com/gevent/gevent.git@c780319e87025130a06f7d2eb9e33ff6d25361dd
greenlet @ git+git://github.com/python-greenlet/greenlet.git@c0e16261293cb401b643290adbb2d824c7200388

Before, I imported them like this:

gevent
greenlet==1.0.0

In the serverless.yml I also specified

plugins:
  - serverless-python-requirements
custom:
  pythonRequirements:
    pythonBin: python3
    zip: true
    gevent: true
    greenlet: true

Any help will be appreciated, thank you so much!

Answer 1

I managed to import the module using Docker instead of import greenlet from its wheel. You need to import a Docker image already set up for playwright, otherwise it won't be able to compile, like this one: mcr.microsoft.com/playwright:v1.10.0-focal.

Another way is to to use a Ubuntu-based image and run: RUN playwright install-deps

I have to say that, even this way, it was very difficult to make the module work properly and I abandoned the idea to use lambda and playwright, but I got pretty far and I hope this info may help someone!