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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 upload(self, file_path, timeout=-1):
 """ Upload an SPP ISO image file or a hotfix file to the appliance. The API supports upload of one hotfix at a time into the system. For the successful upload of a hotfix, ensure its original name and extension are not altered. Args: file_path: Full path to firmware. timeout: Timeout in seconds. Wait for task completion by default. The timeout does not abort the operation in OneView; it just stops waiting for its completion. Returns: dict: Information about the updated firmware bundle. """

        return self._client.upload(file_path, timeout=timeout)