AWS Lambda function can't import paramiko - Unable to import module 'lambda_function': No module named

Question

I try to import paramiko in my AWS Lambda function, written with Python 3.9. I installed paramiko in a folder with pip install paramiko -t . and made a .zip file out of it. Then I added this .zip file to a Lambda Layer and connected it with my Lambda function. And in the Lambda function, I imported paramiko. But now when I test the code the compiler still tells me: Unable to import module 'lambda_function': No module named 'paramiko'.

This is the lambda function:

import io
import boto3
import paramiko

ACCESS_KEY = '...'
PRIVATE_ACCESS_KEY = '...'
AWS_REGION = 'eu-central-1'
INSTANCE = ['...']
EC2_IP = '...'

def lambda_handler(event, context):
    
    #start EC2 instance
    ec2 = boto3.client('ec2', region_name=AWS_REGION)
    ec2.start_instances(InstanceIds=INSTANCE)
    
    print('Started the instance: ' + str(INSTANCE))

Of course, the dots are filled with my credentials.

Error message

Please include error text in your post rather than a link to an external image. — jarmod
– jarmod, Commented Jul 18, 2022 at 14:49
You could use something like this to create a paramiko layer regardless of your host platform. — Anon Coward
– Anon Coward, Commented Jul 19, 2022 at 3:39

luk2302 · Accepted Answer · 2022-07-18 13:27:31Z

1

Lambda unzips layers to /opt.
The Python path contains /opt/python.
You therefore need to sure that your directory structure inside your zip layer should include a top-level python directory and the libraries should all be in that python directory.

answered Jul 18, 2022 at 13:27

luk2302

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2 Comments

J.Fasterling Over a year ago

Thank you very much that solved the first problem. But now I'm getting this error: "errorMessage": "Unable to import module 'lambda_function': cannot import name 'asn1' from 'cryptography.hazmat.bindings._rust' (unknown location)". Any idea where this is coming from?

luk2302 Over a year ago

@J.Fasterling you are most likely not running on a linux system!? In that case pip installs the wrong binary dependencies, you would need to build the zip file e.g. using docker: github.com/jetbridge/paramiko-lambda-layer

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