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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 _handle_result(self):
 """Process one result. Block untill one is available """

        result = self.inbox.get()
        if result.success:
            if self._verbosity >= VERB_PROGRESS:
                sys.stderr.write("\nuploaded chunk {} \n".format(result.index))
            self.results.append((result.index, result.md5))
            self._pending_chunks -= 1
        else:
            raise result.traceback