We do indeed tag components in many different ways. For example:
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if building components programatically in a loop, we use the loop to set tags with code (also this is mentioned in the post I linked to above)
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often, if there are not too many, I set some tags in the
init -
as mentioned above, you may set them in the IDE (with bindings, python expressions, plain strings)
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often sets or groups of components have bindings to data table rows or dictionaries, again, this is where binding comes in handy
I very rarely have to loop through groups of components where there is no prior way of tagging or identifying them. That is, I rarely have to resort to numerical indexing (since this can make for a brittle design).
If you have a specific example you can share where you find the identification/tagging of components difficult to do in a convenient way, please share so we can help more directly.