Return all items from a DynamoDB table by passing the table resource.

scan_all.py

def scan_all(dynamodb_table):
    """Return all items from a DynamoDB table by passing the table resource."""
    results = []
    has_items = True
    last_key = False
    while has_items:
        if last_key:
            data = dynamodb_table.scan(ExclusiveStartKey=last_key)
        else:
            data = dynamodb_table.scan()

        if 'LastEvaluatedKey' in data:
            has_items = True
            last_key = data['LastEvaluatedKey']
        else:
            has_items = False
            last_key = False

        for item in data['Items']:
            results.append(item)
    return results