How to create Lambda Layer in Python

Use Lambda layers to package code and dependencies that you want to reuse across multiple functions. Layers usually contain library dependencies, a custom runtime, or configuration files.

Below are the steps to create lambda layer and test it with lambda function.

• Check python version in your system with "py --version". This version and lambda runtime version MUST match. eg 3.13
• mkdir lambda_layer
• mkdir -p python
• pip install requests -t python/
• Zip python directory.
• Go to AWS and create Lambda layer by uploading python.zip file.
• Create lambda function with the same runtime version eg. 3.13 and attach lambda layer to it.
• import module required modules in lambda_function.py handle file
• Test the function by creating test event.