Resolving the Unable to import module 'app': No module named 'app' Error in AWS Lambda Functions

This guide provides an in-depth solution to the common AWS Lambda error message `Unable to import module 'app': No module named 'app'`. We break down the issue and guide you through the necessary steps to fix it.
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Troubleshooting AWS Lambda: Import Module Error

If you are using AWS Lambda and have encountered the error message "Unable to import module 'app': No module named 'app'", you are not alone. This is a common issue that can be quite frustrating, especially when you are trying to test your function. In this guide, we will dissect the problem and walk you through a solution that will help you get your Lambda function up and running smoothly.

Understanding the Problem

When you receive the error pertaining to the module not being found, it typically indicates an issue with how your code is structured or how it’s packaged. Specifically, AWS Lambda cannot locate the specified module (in this case, app). The structure of your ZIP file and the settings you apply to your Lambda function handler are key elements to address.

Identifying the Core Issue

In your case, you noted the following about your ZIP structure:

Steps to Resolve the Issue

To rectify the import error, follow these steps:

1. Modify the ZIP Structure

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2. Update the AWS Lambda Configuration

Once your ZIP structure is corrected:

Navigate to your AWS Lambda function in the AWS Management Console.

3. Deploy the Updated ZIP File

Deploy the newly created ZIP file to your Lambda function:

Save changes and test your Lambda function again.

Conclusion

Feel free to refer back to this guide whenever you face similar problems, and happy coding in AWS Lambda!