Problem with library loading in AWS lambda function - Python

Question

I'm developing a python function for AWS lambda.

My function works locally, with:

 python-lambda-local -f handler app.py event.json -t 30

However, when I deploy it in AWS Lambda , (with a zip file with all dependencies), it seems the objectify lib is not loaded. Error message:

Unable to import module 'app': cannot import name 'objectify'

This is a snippet of my function:

# -*- coding: utf-8 -*- 
import sys
import logging
import env_config
import pymysql
import traceback
import json
import requests
#from lxml import objectify
import lxml.objectify
import lxml.etree

Answer 1

Lxml uses code compiled in C. You need to precompile the library in the same environment that Lambda runs. Read this to understand more: https://www.azavea.com/blog/2016/06/27/using-python-lxml-amazon-lambda/

This kind person already did the job for you. Just download the precompiled library and replace in your Lambda package: https://github.com/JFox/aws-lambda-lxml