dandelion.polars.core.Dandelion.write_ddl

Dandelion.write_ddl(filename='dandelion.zipddl', compress=True)

Write a Dandelion object to a single .zipddl file (Zarr v3 ZipStore, hybrid storage) with optional compression.

Storage scheme:

• data and metadata → Parquet blobs

• distances → Zarr arrays

• graph, layout and germline → HDF5

Parameters:

• filename (str, optional) – path to output .zipddl file.

• compress (bool, optional) – whether to compress stored data using Blosc/Zstd with bitshuffle. Defaults to True.