PorePy types

[vlipovac]

Hi,

in several places in the package there are definitions of Type Annotations like
GridLike = Union[pp.Grid, pp.MortarGrid]
or
VarLike = Union[pp.ad.Variable, pp.ad.MergedVariable] .

Is there some motivation (and would it make sense) to formally introduce PorePy types and define them clearly in a submodule for a uniform and consistent usage throughout the package?

BR,
Veljko

[IvarStefansson]

Yes, that is something we have considered and would totally make sense.

[keileg]

I second Ivar's opinion. It is not clear to me what is the standard way of defining such types (separate module or something else), but I'm sure the internet has an answer to it.