[daniloefl]

This fixes issue #765

It was tested as follows:

from extra_data.display import SourceGroup
s = SourceGroup()
print(s.add('SQS_ILH_LAS/PROC/BS_CAM_800_OU1'))
print(s.add('SQS_ILH_LAS/PROC/BS_CAM_800_OU2'))
print(s.add("SQS_ILH_LAS/PROC/BS_CAM_TT_OU2"))

The result is:

True
True
False

Before the fix the result was:

True
True
True

[takluyver]

Thanks! I didn't think the fix was quite right here, though - items can still be in a group if the varying part is numeric in one case but not in another - it just won't be treated as a numeric grouping in that case.

What should have prevented this was a check that it's the same part changing in the new entry as between existing ones. But I had made a mistake which meant that this check only started on the 4th addition to the group. I've pushed a version which fixes this now.

[daniloefl]

Thanks! I didn't think the fix was quite right here, though - items can still be in a group if the varying part is numeric in one case but not in another - it just won't be treated as a numeric grouping in that case.

What should have prevented this was a check that it's the same part changing in the new entry as between existing ones. But I had made a mistake which meant that this check only started on the 4th addition to the group. I've pushed a version which fixes this now.

Thank you for checking! That is indeed better. With that change, if it looks good for you, I will merge.

[takluyver]

Thanks, I'm happy with this.