python-lambda-local 0.1.9

Prepare development environment

Please use a newly created virtualenv of Python 2.7 or Python 3.6.

Installation

Within virtualenv, run the following command.

$ pip install python-lambda-local

This will install the package with name python-lambda-local in the virtualenv. Now you can use the command python-lambda-local to run your AWS Lambda function written in Python on your own machine.

Usage as a shell command

Run python-lambda-local -h to see the help.

usage: python-lambda-local [-h] [-l LIBRARY_PATH] [-f HANDLER_FUNCTION]
                           [-t TIMEOUT] [-a ARN_STRING] [-v VERSION_NAME]
                           [-e ENVIRONMENT_VARIABLES] [--version]
                           FILE EVENT

Run AWS Lambda function written in Python on local machine.

positional arguments:
  FILE                  lambda function file name
  EVENT                 event data file name

optional arguments:
  -h, --help            show this help message and exit
  -l LIBRARY_PATH, --library LIBRARY_PATH
                        path of 3rd party libraries
  -f HANDLER_FUNCTION, --function HANDLER_FUNCTION
                        lambda function handler name, default: "handler"
  -t TIMEOUT, --timeout TIMEOUT
                        seconds until lambda function timeout, default: 3
  -a ARN_STRING, --arn-string ARN_STRING
                        ARN string for lambda function
  -v VERSION_NAME, --version-name VERSION_NAME
                        lambda function version name
  -e ENVIRONMENT_VARIABLES, --environment-variables ENVIRONMENT_VARIABLES
                        path to flat json file with environment variables
  --version             print the version of python-lambda-local and exit

├── event.json
├── lib
│   ├── rx
│   │   ├── abstractobserver.py
│   │   ├── ... (package content of rx)
...
│   │       └── testscheduler.py
│   └── Rx-1.2.3.dist-info
│       ├── DESCRIPTION.rst
│       ├── METADATA
│       ├── metadata.json
│       ├── pbr.json
│       ├── RECORD
│       ├── top_level.txt
│       ├── WHEEL
│       └── zip-safe
└── test.py

from __future__ import print_function
from rx import Observable


def handler(event, context):
    xs = Observable.from_(range(event['answer']))
    ys = xs.to_blocking()
    zs = (x*x for x in ys if x % 7 == 0)
    for x in zs:
        print(x)

{
  "answer": 42
}

python-lambda-local -l lib/ -f handler -t 5 test.py event.json

[root - INFO - 2018-11-20 17:10:53,352] Event: {'answer': 42}
[root - INFO - 2018-11-20 17:10:53,352] START RequestId: 3c8e6db4-886a-43da-a1c7-5e6f715de531 Version:
0
49
196
441
784
1225
[root - INFO - 2018-11-20 17:10:53,359] END RequestId: 3c8e6db4-886a-43da-a1c7-5e6f715de531
[root - INFO - 2018-11-20 17:10:53,360] REPORT RequestId: 3c8e6db4-886a-43da-a1c7-5e6f715de531  Duration: 2.17 ms
[root - INFO - 2018-11-20 17:10:53,360] RESULT:
None

Usage as a library

call(func, event, context, environment_variables={})

pip install rx

from lambda_local.main import call
from lambda_local.context import Context

import test

event = {
    "answer": 42
}
context = Context(5)

call(test.handler, event, context)