def key_exists()

in experiments/notebooks/cloudstory-api/cloudstory.py [0:0]

• 10 lines of code
• 3 McCabe index (conditional complexity)

def key_exists(bucket, key):
    try:
        s3_resource.Object(bucket, key).load()
    except botocore.exceptions.ClientError as e:
        if e.response['Error']['Code'] == "404":
            # The key does not exist.
            return(False)
        else:
            # Something else has gone wrong.
            raise
    else:
        # The key does exist.
        return(True)