fix Detections.get_data_item() bug (#1061)

[rolson24]

Description

When I tried to use boolean array indexing to get specific detections from a Detections object, the data field sometimes returned the wrong values (everything is the second value) and sometimes it just didn't work. (See issue #1061)

This is an issue I ran into while trying to simplify ByteTrack.update_with_detections(). Boolean indexing is a feature that is commonly used in general and it would be good to ensure Detections works the same way np.arrays and lists work.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How has this change been tested, please provide a testcase or example of how you tested the change?

I tested this with the same test cases from my bug report. Colab notebook

Any specific deployment considerations

For example, documentation changes, usability, usage/costs, secrets, etc.

Docs

• Docs updated? What were the changes:

[SkalskiP]

Hi @rolson24 👋🏻 Thanks a lot for identifying the bug and preparing the fix. I've tested it; I'll add some unit tests as well.