Unable to import module 'lambda_function': No module named 'pymongo'

Question

I have followed this guide last year to build my AWS python archive and it was working.

Today i have automated my code deployment and it was not working (i am using shutil.make_archive("package", 'zip', root_dir=path, base_dir="package/", verbose=True) instead of the zip -r package.zip package/ command now.

But when i start doing all these steps manually again and deploy (without the automated code) it's not working anymore.

Here is what my folders look like :

The only thing that has changed since the last time it was working is the pymongo version which was 3.12 instead of 4.3.3.

My handler is :

def lambda_handler(event, context):
    print(event)

The error i am getting from CloudWatch :

[ERROR] Runtime.ImportModuleError: Unable to import module 'lambda_function': No module named 'pymongo'
Traceback (most recent call last):

What am i doing wrong ?

EDIT :

I have found an old dependency package that is working, but that is using more than just pymongo[srv] so i will check what may be different but the error comes from the dependencies.

Manish sah · Accepted Answer · 2022-12-29 16:05:26Z

2

For lambda to find your external dependency, all your dependency must be inside audio-handler folder and not package. By default, lambda looks for dependency in the root directory.

audio-handler
 |-bson
 |-pymongo
 .
 .
 .
 |-lambda_function.py

Here is the video on how to create your deployment package and deploy it on aws lambda https://www.youtube.com/watch?v=Jtlxf_kn5zY

edited Dec 29, 2022 at 16:05

answered Dec 29, 2022 at 16:02

Manish sah

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1 Comment

Tom3652 Over a year ago

Thanks indeed i was zipping the package folder instead of its content recursively.

Leeroy Hannigan · Accepted Answer · 2022-12-29 16:07:09Z

0

I would strongly advise that you use a Lambda Layer to import external modules, ensuring your packaged components are at the root of the project and not within a directory named package.

Add External Python Libraries to AWS Lambda using Lambda Layers https://www.linkedin.com/pulse/add-external-python-libraries-aws-lambda-using-layers-gabe-olokun

edited Dec 29, 2022 at 16:07

answered Dec 29, 2022 at 13:39

Leeroy Hannigan

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2 Comments

Tom3652 Over a year ago

Thanks for your answer and the link you provided, but adding the layer didn't change anything i am stil lgetting the error. This is so weird as it was working fine last week.. could this come from the dependencies themselves ? I am installing pymongo[srv] as a dependency

Leeroy Hannigan Over a year ago

Expose the dependencies under Audio-Handler directory and remove the packages directory.

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