AWS Lambda import module error in python

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.

Solution 1:

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 Python_File_Name.Method_Name. In this scenario, I named it lambda.lambda_handler (lambda.py is the file name).

Please find below the snapshot.

Solution 2:

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

Solution 3:

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

Solution 4:

I found Nithin's answer very helpful. Here is a specific walk-through:

Look-up these values:

1. 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
2. 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.
3. 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