How to use the papermill.s3.Key function in papermill

page_iterator = paginator.paginate(**operation_parameters)

        def sort(item):
            if 'Key' in item:
                return item['Key']
            return item['Prefix']

        for page in page_iterator:
            locations = sorted(
                [i for i in page.get('Contents', []) + page.get('CommonPrefixes', [])], key=sort
            )

            for item in locations:
                if objects or keys:
                    if 'Key' in item:
                        yield Key(
                            bucket,
                            item['Key'],
                            size=item.get('Size'),
                            etag=item.get('ETag'),
                            last_modified=item.get('LastModified'),
                            storage_class=item.get('StorageClass'),
                            service=self,
                        )
                    elif objects:
                        yield Prefix(bucket, item['Prefix'], service=self)
                else:
                    prefix = item['Key'] if 'Key' in item else item['Prefix']
                    yield 's3://{}/{}'.format(bucket, prefix)

def _get_key(self, name):
        if isinstance(name, Key):
            return name

        return Key(bucket=self._bucket_name(name), name=self._key_name(name), service=self)

def _get_key(self, name):
        if isinstance(name, Key):
            return name

        return Key(bucket=self._bucket_name(name), name=self._key_name(name), service=self)