Error: ImportError: No module named boto3 (DynamoDB)

Python cannot import Boto3 from the environment running your application. Installing the separate boto package does not install Boto3.

Create or activate your project's virtual environment, then use that interpreter to install and verify the package:

python -m pip install boto3
python -c "import sys, boto3; print(sys.executable); print(boto3.__version__)"

If the verification works in a terminal but the application still fails, check which interpreter your IDE, notebook kernel, service or container uses. Add Boto3 to the project's dependency file and rebuild the deployment environment when appropriate. Avoid naming a local file boto3.py, which can shadow the installed package.

Use a supported Python release and a Boto3 version compatible with it. See the Boto3 quickstart and our DynamoDB Python guide.