returns (json): returns last upload json results or False

def get_last_upload_results(self):
        """
            returns (json): returns last upload json results or False
        """
        if os.path.isfile(constants.last_upload_results_file):
            logger.debug('Last upload file %s found, reading results.', constants.last_upload_results_file)
            with open(constants.last_upload_results_file, 'r') as handler:
                return handler.read()
        else:
            logger.debug('Last upload file %s not found, cannot read results', constants.last_upload_results_file)
            return False