aws lambda Unable to import module 'lambda_function': No module named 'requests'

Question

I have recently started to use AWS Lambda to use triggers against some python code I have written. I currently have 2 lambda functions, both of which have been created with ZIP files. The second one I created is supposed to test the trigger events.

This is for testing purposes so I'm using the best code of all:

def lambda_handler(event, context):
    print ("Hello World")

However, I get this error back:

Response:
{
  "errorMessage": "Unable to import module 'lambda_function'"
}

Request ID:
"65024f16-172c-11e8-ab26-27ff3322e597"

Function Logs:
START RequestId: 65024f16-172c-11e8-ab26-27ff3322e597 Version: $LATEST
Unable to import module 'lambda_function': No module named 'requests'

END RequestId: 65024f16-172c-11e8-ab26-27ff3322e597
REPORT RequestId: 65024f16-172c-11e8-ab26-27ff3322e597  Duration: 15.93 ms  
Billed Duration: 100 ms     Memory Size: 128 MB Max Memory Used: 22 MB  

Everywhere I have searched for this, the answer was solved by making sure the names for the functions were correct or making sure the .zip file was readable. I have satisfied both of these conditions (the name of the file is lambda_function.py and it is in the root).

Alternatively, it seems like it might be an issue with the logs. I double checked my permission and I have the ability to create logs with all resources. Any other ideas what the issue might be?

Solution 1

requests library doesn't come by default in lambda. It looks like you are trying to import it in your function / library somewhere. To import it, you need the following line:

from botocore.vendored import requests

Alternatively, you would need to zip the requests library in the root of your zip file.

EDIT: There may be a dependency in one of your libraries that may need this. To overcome this, install requests in your application zip. To do this, run the following command in the root directory of your application: pip install requests -t ./.

A better way would be to create a file called requirements.txt and add all the dependencies in there. Use virtualenv to install all the packages defined in the requirements.txt using: pip install -r requirements.txt -t ./

---

UPDATE: Starting 10/21/19, the vendored version of the requests library in botocore will be removed. Refer this blog post for more details.

Solution 2

Give it a check to this answer

If you're working with Python on AWS Lambda, and need to use requests, you better use urllib3, it is currently supported on AWS Lambda and you can import it directly, check the example on urllib3 site.

import urllib3

http = urllib3.PoolManager()
r = http.request('GET', 'http://httpbin.org/robots.txt')

r.data
# b'User-agent: *\nDisallow: /deny\n'
r.status
# 200

Solution 3

This will surely work. Just follow the steps:

Create a "python" directory inside any empty directory and pip install the modules there

mkdir lambda_layers
cd lambda_layers
mkdir python
cd python
pip install requests -t ./
cd ..
zip -r python_modules.zip .

If you want to have multiple modules in a single layer then install them inside the same 'python' directory that you have just created.

Just make sure that you zip the "python" directory itself recursively with '-r'. That way lambda handler can locate the module in the default python version that you are using.

Now you have your 'python_modules.zip' file with all the dependent modules inside. Go to the Layers of Lambda in the AWS console and create a layer uploading this zip file. Choose the runtimes as per your python version that you are using in your lambda function, or you can select multiple python runtime versions. Add this layer to your lambda function and you should be able to import your modules flawlessly.

Solution 4

Unable to import module 'lambda_function': No module named 'requests'

Please try using python3.7 as a runtime. It will fix the requests issue!

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