run_lambda is a Python package for running Python AWS 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_lambdaYou can also download the source from Github.
Documentation for the package can be found on Read the Docs.