Type aliases

SingleCellColumn

str | pl.Expr | pl.Series | np.ndarray | Callable[[SingleCell], pl.Series | np.ndarray]

A flexible column specification. Can be a column name (string), a Polars expression, a Polars Series, a 1D NumPy array, or a function that takes a SingleCell dataset and returns a Series or array.

Used by SingleCell.qc(), SingleCell.find_doublets(), SingleCell.pseudobulk(), SingleCell.hvg(), SingleCell.normalize(), and others.

Scalar

str | int | float | Decimal | date | time | datetime | timedelta | bool | bytes | Expr | Series | Iterable[Scalar]

Any primitive literal or sequence thereof. Accepted wherever a single value (or a 1-D sequence of values) is expected – filter thresholds, default fills, single-column inputs, etc.

UnsDict

dict[str, str | int | float | bool | np.ndarray | 'UnsDict']

A nested dictionary of unstructured metadata. Values can be scalars (strings, numbers, Booleans), NumPy arrays, or nested dictionaries of the same types. Stored in SingleCell.uns.