[ENH] handle bagel files that contain data coming from several datasets

[Remi-Gau]

Is there an existing issue for this?

• I have searched the existing issues

New feature

I am thinking to automatically generate a bagel.csv file when using the cohort_creator.
But as this one combines data from several datasets, it may be useful to allow for an optional column that contains the dataset name and to allow filterting with this column.

In practice this may mean that records would be a unique for a dataset / sub / ses combination and not just for a sub / ses combination.

Unclear documentation

No response

[Remi-Gau]

adding an example of bagel.csv for this use case:

bagel.zip

[Remi-Gau]

adding one that leads to an error because of

Index contains duplicate entries, cannot reshape

bagel_duplicate_entries.zip

[github-actions]

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[github-actions]

We want to keep our issues up to date and active. This issue hasn't seen any activity in the last 30 days.
We have applied the stale-issue label to indicate that this issue should be reviewed again and then either prioritized or closed.