fqxv 0.4.0

Read-only Python bindings for the fqxv FASTQ archiver

fqxv (Python)

Read-only Python bindings for fqxv, a Rust toolkit for lossless FASTQ archiving.

import fqxv

# Stream records (works on every layout, including reordered archives)
for rec in fqxv.open("reads.fqxv"):
    print(rec.name, rec.sequence, rec.quality)  # all bytes

# In-memory input works too
data = open("reads.fqxv", "rb").read()
n = sum(1 for _ in fqxv.open(data))

# Whole-archive convenience
fqxv.decompress_to_path("reads.fqxv", "reads.fastq")
raw = fqxv.decompress_to_bytes("reads.fqxv")
info = fqxv.inspect("reads.fqxv")
print(info.reads, info.format_version, info.platform)

# Column projection / random access (plain layout only)
idx = fqxv.open_index("reads.fqxv")
seqs = fqxv.read_sequences("reads.fqxv")        # list[bytes], skips quality
ids = fqxv.read_names("reads.fqxv", groups=[0]) # just the first row group
block0 = fqxv.read_block("reads.fqxv", 0)       # list[Record]

Projection and open_index are unavailable for globally-reordered archives (--order shuffle), whose streams are mutually dependent; use fqxv.open() to iterate those. Everything here is read-only — compression stays in the CLI.

Build from source

uv pip install maturin
maturin develop            # from crates/fqxv-python/