Why you use different weighting methods in ix.searcher?

[luofuli]

Hello, I am wondering why you adopt two different weighting methods in ix.searcher.
More specifically, when transfering negative (0) sentiment results, you use BM25F (the whoosh.scoring module is default as BM25F).

Sentiment-and-Style-Transfer/src/tool/retrieve_mode_my_0.py

Line 83 in 250d22d

with ix.searcher() as searcher:

But, when transfering positive (1) sentiment results, you use TFIDF

Sentiment-and-Style-Transfer/src/tool/retrieve_mode_my_1.py

Line 83 in 250d22d

with ix.searcher(weighting=scoring.TF_IDF()) as searcher: