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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, name: str) -> bool: """ Attempts to upload a given Docker image from this server to DockerHub. Parameters: name: the name of the Docker image. Returns: `True` if successfully uploaded, otherwise `False`. """

        try:
            out = self.__docker.images.push(name, stream=True)
            for line in out:
                line = line.strip().decode('utf-8')
                jsn = json.loads(line)
                if 'progress' in jsn:
                    line = "{}. {}.".format(jsn['status'], jsn['progress'])
                    print(line, end='\r')
                elif 'status' in jsn:
                    print(jsn['status'])
            print('uploaded image to DockerHub: {}'.format(name))
            return True
        except docker.errors.NotFound:
            print("Failed to push image ({}): not installed.".format(name))
            return False