AWS Lambda with Zappa fails on Unable to import module handler No module named builtins

Question

I've deployed my application to AWS Lambda with Zappa. The deployment went fine without any issues. But when I try to reach the app via AWS API Gateway I get a 500 response.

The logs says

Unable to import module 'handler': No module named builtins

The environment runs on Python 2.7. I've added future to the Pipfile but it still won't work.

When I check the code in Lambda I can see the following code

from __future__ import unicode_literals

import base64
import boto3
import collections
import datetime
import importlib
import inspect
import json
import logging
import os
import sys
import traceback
import zipfile

from builtins import str

I can't find what can be wrong. Does anyone have a clue?

Answer 1

I solved the problem. I'm using pipenv to install my packages, but for some reason the packages wasn't installed inside the virtual environment, which made Zappa to not include them to AWS Lambda. I had to install them manually in PyCharm by going through Settings > Project > Project Interpreter and add the packages there. Thanks for your help.