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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def ngfileupload_partfactory(part_number=None, content_length=None, uploaded_file=None):
 """Part factory for ng-file-upload. :param part_number: The part number. (Default: ``None``) :param content_length: The content length. (Default: ``None``) :param uploaded_file: The upload request. (Default: ``None``) :returns: The content length, part number, stream, HTTP Content-Type header. """

    return content_length, part_number, uploaded_file.stream, \
        uploaded_file.headers.get('Content-Type'), None, None