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mecfs_bio.build_system.task.ppp_database.allele_key

Order-agnostic allele key, shared across the PPP-database tasks for allele-aware variant matching (so a swapped effect/non-effect orientation still matches).

Functions:

unordered_allele_key 

unordered_allele_key(a: str, b: str) -> pl.Expr

Sort the two allele columns and join them, so {A, B} == {B, A}.

Source code in mecfs_bio/build_system/task/ppp_database/allele_key.py 
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def unordered_allele_key(a: str, b: str) -> pl.Expr:
    """Sort the two allele columns and join them, so {A, B} == {B, A}."""
    return (
        pl.when(pl.col(a) <= pl.col(b))
        .then(pl.col(a) + pl.lit("_") + pl.col(b))
        .otherwise(pl.col(b) + pl.lit("_") + pl.col(a))
    )