pyfaidx: Efficient FASTA Access

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library 0.9.0.4 ·python
verified May 21, 2026

pyfaidx is a Python library that provides efficient, pythonic random access to subsequences within FASTA files, compatible with samtools index format (.fai). It allows for fast retrieval and in-place modification without loading the entire file into memory. The current version is 0.9.0.4, with frequent minor updates and bug fixes.

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