Why the query IDs have to be integers

[kwang2049]

Hi,

I saw at this line, pyserini needs to make sure the query IDs are integers. May I ask why does it need that? It would be very inconvenient for some datasets and one need to re-map the query IDs from strings to integers somehow.

[lintool]

They don't need to be integers. E.g.,

pyserini.search.lucene.get_topics('car17v1.5-benchmarkY1test').keys()

The topic ids are:

dict_keys(['Drinking%20water/Regulation/United%20States', 'Beach%20nourishment/Alternatives/complements%20to%20nourishment', 
...