message_ix_models.model.transport.factor.Constant

class message_ix_models.model.transport.factor.Constant(value: float | AttrSeries, dims: str | Sequence[str])

Bases: Layer

A value that is constant across 1 or more dims.

Parameters:

• value (genno.core.attrseries.AttrSeries) – If not Quantity, it is transformed to one.

• dims (Tuple[str, ]) – Either a sequence of str, or a single str expression like “x y z” or “x-y-z”, which is split to a sequence.

__init__(value: float | AttrSeries, dims: str | Sequence[str])

Methods

__init__(value, dims)
apply(other, coords)	quantify() this layer and combine it with other.
operation(b, /)	Same as a * b.
quantify(coords)	Return a quantification of the layer.

Attributes

value	Fixed value.
dims	Dimensions of the result.

apply(other: AttrSeries, coords: Mapping[str, Any]) → AttrSeries

quantify() this layer and combine it with other.

Subclasses may override this method. The default implementation combines other with the results of quantify() using operation.

dims: Tuple[str, ...]

Dimensions of the result.

operation(b, /)

Same as a * b.

quantify(coords)

Return a quantification of the layer.

The returned value:

• May have any of the dimensions indicated by coords.

• For such dimensions, should have some or all of the labels in coords.

Subclasses must implement this method.

value: AttrSeries

Fixed value.