You saved my ass! Was looking for this (incomming delegations) :-)
Thanks a lot

I do like @isnochys but not using a dict but two lists. One with the "delegator" only for quick check. If not in list, append delegator and append the whole set of information to another list[list].

No need to remove 0-Delegations at the end when check before adding: Just adding the name to the delegatorslist but not the data.