AWS Lambda import module error in python

Question

I am creating a AWS Lambda python deployment package  I am using one external dependency requests   I installed the external dependency using the AWS documentation http   docs aws amazon com lambda latest dg lambda-python-how-to-create-deployment-package html  Below is my python code    import requests  print  Loading function    s3   boto3 client  s3     def lambda handler event  context        print  Received event      json dumps event  indent 2          Get the object from the event and show its content type     bucket   event  Records   0   s3    bucket    name       key   urllib unquote plus event  Records   0   s3    object    key    decode  utf8       try          response   s3 get object Bucket bucket  Key key          s3 download file bucket key    tmp data txt           lines    line rstrip   n   for line in open   tmp data txt            for line in lines              col line split                  print col 5  col 6           print  CONTENT TYPE      response  ContentType            return response  ContentType       except Exception as e          print e          print  Error getting object    from bucket     Make sure they exist and your bucket is in the same region as this function   format key  bucket           raise e   Created the Zip the content of the project-dir directory and uploaded to the lambda Zip the directory content  not the directory   When I am execute the function I am getting the below mentioned error    START RequestId  9e64e2c7-d0c3-11e5-b34e-75c7fb49d058 Version   LATEST   Unable to import module  lambda function   No module named lambda function    END RequestId  9e64e2c7-d0c3-11e5-b34e-75c7fb49d058 REPORT RequestId  9e64e2c7-d0c3-11e5-b34e-75c7fb49d058  Duration  19 63 ms  Billed Duration  100 ms     Memory Size  128 MB Max Memory Used  9 MB   Kindly help me to debug the error

User · Answer

The issue here that the Python version used to build your Lambda function dependencies (on your own machine) is different than the selected Python version for your Lambda function. This case is common especially if the Numpy library part of your dependencies.

Example: Your machine's python version: 3.6 ---> Lambda python version 3.6

User · Answer

There are just so many gotchas when creating deployment packages for AWS Lambda  for Python   I have spent hours and hours on debugging sessions until I found a formula that rarely fails   I have created a script that automates the entire process and therefore makes it less error prone  I have also wrote tutorial that explains how everything works  You may want to check it out    Hassle-Free Python Lambda Deployment  Tutorial   Script

User · Answer

I found Nithin s answer very helpful  Here is a specific walk-through   Look-up these values    The name of the lambda handler function in your python script  The name used in the AWS examples is  lambda handler  looking like  def lambda handler event  context    In this case  the value is  lambda handler  In the Lambda dashboard  find the name of the Handler in the  Handler  text-box in the  Configuration  section in the lambda dashboard for the function  shown in Nithin s screenshot   My default name was  lambda function lambda handler   The name of your python script  Let s say it s  cool py    With these values  you would need to rename the handler  shown in the screenshot  to  cool lambda handler   This is one way to get rid of the  Unable to import module  lambda function   errorMessage  If you were to rename the handler in your python script to  sup  then you d need to rename the handler in the lambda dashboard to  cool sup

User · Answer

nithin  AWS released layers concept inside Lambda functions  You can create your layer and there you can upload as much as libraries and then you can connect the layer with the lambda functions  For more details  https   docs aws amazon com lambda latest dg configuration-layers html

User · Answer

No need to do that mess   use python-lambda  https   github com nficano python-lambda  with single command pylambda deploy it will automatically deploy your function

User · Answer

Error was due to file name of the lambda function  While creating the lambda function it will ask for Lambda function handler  You have to name it as your Python File Name Method Name  In this scenario I named it as lambda lambda handler  lambda py is the file name     Please find below the snapshot

User · Answer

Please add below one after Import requests import boto3 What I can see that is missing in your code

User · Answer

In lambda handler the format must be lambda filename lambda functionName  Supposing you want to run the lambda handler function and it s in lambda fuction py  then your handler format is lambda function lambda handler   Another reason for getting this error is module dependencies   Your lambda fuction py must be in the root directory of the zip file

User · Answer

I ran into the same issue  this was an exercise as part of a tutorial on lynda com if I m not wrong   The mistake I made was not selecting the runtime as Python 3 6 which is an option in the lamda function console

User · Answer

I had the error too  Turn out that my zip file include the code parent folder  When I unzip and inspect the zip file  the lambda function file is under parent folder   lambda   Use the zip command  fix the error   zip -r    lambda zip

User · Answer

If you are uploading a zip file  Make sure that you are zipping the contents of the directory and not the directory itself

User · Answer

Actually go to the main folder  deployment package that you want to zip  Inside that folder select all files and then create the zip and upload that zip

User · Answer

A perspective from 2019   AWS Lambda now supports Python 3 7  which many people  including myself  choose to use as the runtime for inline lambdas   Then I had to import an external dependency and I followed AWS Docs as the OP referred to   local install --  zip --  upload    I had the import module error and I realised my local PC had Python 2 7 as the default Python  When I invoked pip  it installed my dependency for Python 2 7   So I switched locally to the Python version that matches the selected runtime version in the lambda console and then re-installed the external dependencies  This solved the problem for me  E g      python3 -m pip install --target path to lambda file  lt external dependency name gt

User · Answer

Sharing my solution for the same issue  just in case it helps anyone   Issue  I got error    ERROR  Runtime ImportModuleError  Unable to import module  lambda function   No module named  StringIO   while executing aws-big-data-blog  code 1  provided in AWS article 2     Solution   Changed Runtime from Python 3 7 to Python 2 7   1      https   github com bsnively aws-big-data-blog blob master aws-blog-vpcflowlogs-athena-quicksight CloudwatchLogsToFirehose lambdacode py  2      https   aws amazon com blogs big-data analyzing-vpc-flow-logs-with-amazon-kinesis-firehose-amazon-athena-and-amazon-quicksight

User · Answer

Your package directories in your zip must be world readable too  To identify if this is your problem  Linux  use  find  ZIP SOURCE -type d -not -perm  001 -printf  M   quot  p n quot   To fix use  find  ZIP SOURCE  -type d -not -perm  001 -exec chmod o x        File readable is also a requirement  To identify if this is your problem use  find  ZIP SOURCE -type f -not -perm  004 -printf  M   quot  p n quot   To fix use  find  ZIP SOURCE  -type f -not -perm  004 -exec chmod o r        If you had this problem and you are working in Linux  check that umask is appropriately set when creating or checking out of git your python packages e g  put this in you packaging script or  bashrc  umask 0002

User · Answer

I found this hard way after trying all of the solutions above  If you re using sub-directories in the zip file  ensure you include the   init   py file in each of the sub-directories and that worked for me

User · Answer

My problem was that the  py file and dependencies were not in the zip s  root  directory   e g the path of libraries and lambda function  py must be    lt lambda function name gt  py  lt name of library gt  foo bar    not    foo bar  lt name of library gt  foo2 bar2  For example   drwxr-xr-x  3 0 unx        0 bx stor 20-Apr-17 19 43 boto3 ec2   pycache    -rw-r--r--  3 0 unx      192 bx defX 20-Apr-17 19 43 boto3 ec2   pycache     init   cpython-37 pyc -rw-r--r--  3 0 unx      758 bx defX 20-Apr-17 19 43 boto3 ec2   pycache   deletetags cpython-37 pyc -rw-r--r--  3 0 unx      965 bx defX 20-Apr-17 19 43 boto3 ec2   pycache   createtags cpython-37 pyc -rw-r--r--  3 0 unx     7781 tx defN 20-Apr-17 20 33 download-cs-sensors-to-s3 py

User · Answer

You can configure your Lambda function to pull in additional code and content in the form of layers  A layer is a ZIP archive that contains libraries  a custom runtime  or other dependencies  With layers  you can use libraries in your function without needing to include them in your deployment package  Layers let you keep your deployment package small  which makes development easier    References -    https   docs aws amazon com lambda latest dg configuration-layers html https   towardsdatascience com introduction-to-amazon-lambda-layers-and-boto3-using-python3-39bd390add17

User · Answer

You need to zip all the requirements  use this script     usr bin env bash rm package zip mkdir package pip install -r requirements txt --target package cat  1  gt  package lambda function py cd package zip -r9     package zip    cd    rm -rf package   use with   package sh  lt python file gt

User · Answer

Another source of this problem is the permissions on the file that is zipped  It MUST be at least world-wide readable   min chmod 444   I ran the following on the python file before zipping it and it worked fine   chmod u rwx go r

User · Answer

Make sure that you are zipping all dependencies in a folder structure as python  Your All Dependencies  to make it work as per this documentation    https   docs aws amazon com lambda latest dg configuration-layers html configuration-layers-path

User · Answer

Here s a quick step through   Assume you have a folder called deploy  with your lambda file inside call lambda function py  Let s assume this file looks something like this   p1 and p2 represent third-party packages    import p1 import p2  def lambda handler event  context         more code here      return            status   200           body     Hello from Lambda            For every third-party dependency  you need to pip install  lt third-party-package gt  --target   from within the deploy folder    pip install p1 --target   pip install p2 --target     Once you ve done this  here s what your structure should look like   deploy   -- lambda function py  -- p1        --   init   py       -- a py       -- b py       -- c py  -- p2       --   init   py      -- x py      -- y py      -- z py   Finally  you need to zip all the contents within the deploy folder to a compressed file  On a Mac or Linux  the command would look like zip -r    deploy zip   from within the deploy folder  Note that the -r flag is for recursive subfolders   The structure of the file zip file should mirror the original folder   deploy zip   -- lambda function py  -- p1        --   init   py       -- a py       -- b py       -- c py  -- p2       --   init   py      -- x py      -- y py      -- z py   Upload the zip file and specify the  lt file name gt   lt function name gt  for Lambda to enter into your process  such as lambda function lambda handler for the example above

[python] AWS Lambda import module error in python

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