run_lambda is a Python package for running Python AWS Lambda <https://aws.amazon.com/lambda/>_ functions locally. It offers a Python module for automated testing of Lambda functions, as well as a command-line interface for ad-hoc local invocations.

Not exactly. There are other programs for locally running Python Lambda functions. However, all of the other utilities (that I know of) only provide a command-line tool. A command-line tool is great for quick manual invocations. However, if you want to create robust, automated tests for your Lambda functions, a Python module that you can import and call is more appropriate. run_lambda is unique because it offers both a simple command-line tool for manual invocations, and an importable Python module for automated tests.

run_lambda supports

• An interface for examining the result (return value, exception, timeout) of a function call
• A full implementation of AWS Context objects
• Function calls with or without a timeout
• Resource usage profiling (memory and run-time)
• Convenient mocking of objects and services inside Lambda functions

The easiest way to install is via pip::

$ pip install run_lambda

You can also download the source from Github <https://www.github.com/ethantkoenig/run_lambda>_.

Documentation for the package can be found on Read the Docs <http://run-lambda.readthedocs.io>_.