Tool:Pyfaidx: Efficient, "Pythonic" Random Access To Fasta Files Using Samtools-Compatible Indexing pyfaidx is a Python package for random access and indexing of fasta files. It uses the same indexing scheme as samtools faidx and therefore can generate/use the same "fasta.fai" indices. BioPython has something similar, although to my knowledge it creates an in-memory index of similar structure but