arviz.labels.mix_labellers(labellers, class_name='MixtureLabeller')[source]#

Combine Labeller classes dynamically.

The Labeller class aims to split plot labeling in ArviZ into atomic tasks to maximize extensibility, and the few classes provided are designed with small deviations from the base class, in many cases only one method is modified by the child class. It is to be expected then to want to use multiple classes “at once”.

This functions helps combine classes dynamically.

For a general overview of ArviZ label customization, including mix_labellers, see the Label guide page.

labellersiterable of types

Iterable of Labeller types to combine

class_namestr, optional

The name of the generated class


Mixture class object. It is not initialized, and it should be initialized before passing it to ArviZ functions.


Combine the DimCoordLabeller with the MapLabeller to generate labels in the style of the DimCoordLabeller but using the mappings defined by MapLabeller. Note that this works even though both modify the same methods because MapLabeller implements the mapping and then calls super().method.

from arviz.labels import mix_labellers, DimCoordLabeller, MapLabeller
l1 = DimCoordLabeller()
sel = {"dim1": "a", "dim2": "top"}
print(f"Output of DimCoordLabeller alone > {l1.sel_to_str(sel, sel)}")
l2 = MapLabeller(dim_map={"dim1": "$d_1$", "dim2": r"$d_2$"})
print(f"Output of MapLabeller alone > {l2.sel_to_str(sel, sel)}")
l3 = mix_labellers(
    (MapLabeller, DimCoordLabeller)
)(dim_map={"dim1": "$d_1$", "dim2": r"$d_2$"})
print(f"Output of mixture labeller > {l3.sel_to_str(sel, sel)}")
Output of DimCoordLabeller alone > dim1: a, dim2: top
Output of MapLabeller alone > a, top
Output of mixture labeller > $d_1$: a, $d_2$: top

We can see how the mappings are taken into account as well as the dim+coord style. However, he order in the labellers arg iterator is important! See for yourself:

l4 = mix_labellers(
    (DimCoordLabeller, MapLabeller)
)(dim_map={"dim1": "$d_1$", "dim2": r"$d_2$"})
print(f"Output of inverted mixture labeller > {l4.sel_to_str(sel, sel)}")
Output of inverted mixture labeller > dim1: a, dim2: top