Error: Boto3 DynamoDB KeyError

KeyError is a Python dictionary-access error. It often occurs after a successful GetItem request returns no Item, or when code expects a response field that belongs to another operation.

import boto3

table = boto3.resource("dynamodb").Table("People")
response = table.get_item(Key={"pk": "person-1"}, ConsistentRead=True)
item = response.get("Item")
if item is None:
    print("No matching person")
else:
    print(item.get("name", "Unnamed"))

GetItem returns Item only when a record exists. Query and Scan return an Items list. UpdateItem returns Attributes only when the requested ReturnValues mode produces them. Inspect the response structure and the exact key named in the traceback.

Do not create a GSI merely to fix KeyError. First confirm the account, Region and complete primary key. Use a missing-value fallback only where absence is valid; if an attribute is required by the application, report or repair the malformed record instead of silently substituting data.

See boto3 response examples and AWS documentation.