Colab (Mask R-CNN Det Tutorial.ipynb) trows error

[thomasf1]

Thanks for your error report and we appreciate it a lot.

Checklist

Done. The Colab demo does include versions and should be kept up to date to make a good first impression.

Describe the bug Running the Colab, it trows an error in this section:

convert_balloon_to_coco(
    './ballondatasets/balloon/train/via_region_data.json',
    './ballondatasets/balloon/train/annotation_coco.json',
    './ballondatasets/balloon/train/')

Excetion:

TypeError                                 Traceback (most recent call last)
[<ipython-input-48-49da3357b67b>](https://localhost:8080/#) in <cell line: 1>()
----> 1 convert_balloon_to_coco(
      2     './ballondatasets/balloon/train/via_region_data.json',
      3     './ballondatasets/balloon/train/annotation_coco.json',
      4     './ballondatasets/balloon/train/')
      5 

1 frames
[/usr/local/lib/python3.10/dist-packages/mmengine/utils/progressbar.py](https://localhost:8080/#) in track_iter_progress(tasks, bar_width, file)
    238         task_num = len(tasks)
    239     else:
--> 240         raise TypeError(
    241             '"tasks" must be a tuple object or a sequence object, but got '
    242             f'{type(tasks)}')

TypeError: "tasks" must be a tuple object or a sequence object, but got <class 'dict_values'>

Reproduction

Unaltered demo Colab

2. Did you make any modifications on the code or config? Did you understand what you have modified? No
3. What dataset did you use? Unaltered demo Colab