def add_task(
        self,
        description: str,
        start: bool = True,
        total: Optional[float] = 100.0,
        completed: int = 0,
        visible: bool = True,
        **fields: Any,
    ) -> TaskID:
        """Add a new 'task' to the Progress display.

        Args:
            description (str): A description of the task.
            start (bool, optional): Start the task immediately (to calculate elapsed time). If set to False,
                you will need to call `start` manually. Defaults to True.
            total (float, optional): Number of total steps in the progress if known.
                Set to None to render a pulsing animation. Defaults to 100.
            completed (int, optional): Number of steps completed so far. Defaults to 0.
            visible (bool, optional): Enable display of the task. Defaults to True.
            **fields (str): Additional data fields required for rendering.

        Returns:
            TaskID: An ID you can use when calling `update`.
        """
        with self._lock:
            task = Task(
                self._task_index,
                description,
                total,
                completed,
                visible=visible,
                fields=fields,
                _get_time=self.get_time,
                _lock=self._lock,
            )
            self._tasks[self._task_index] = task
            if start:
                self.start_task(self._task_index)
            new_task_index = self._task_index
            self._task_index = TaskID(int(self._task_index) + 1)
        self.refresh()
        return new_task_index
Add a new 'task' to the Progress display.

        Args:
            description (str): A description of the task.
            start (bool, optional): Start the task immediately (to calculate elapsed time). If set to False,
                you will need to call `start` manually. Defaults to True.
            total (float, optional): Number of total steps in the progress if known.
                Set to None to render a pulsing animation. Defaults to 100.
            completed (int, optional): Number of steps completed so far. Defaults to 0.
            visible (bool, optional): Enable display of the task. Defaults to True.
            **fields (str): Additional data fields required for rendering.

        Returns:
            TaskID: An ID you can use when calling `update`.
        
rich/progress.py