PrecisionWarning

exception PrecisionWarning

Warning that points could not be generated at the requested precision.

Raised when pyvista.core.config.Config.points_dtype asks for a wider dtype than the VTK algorithm that ran can generate. The output points are cast up so that the dtype is the one asked for, but the values they hold have the precision the algorithm produced, and casting cannot bring back digits it already discarded.

The message names whatever generated the points: the VTK class for a filter, the PyVista class for a source, since a source is its own algorithm, and the library for a hull computed outside VTK.

Being a warning rather than an error is what keeps the choice with the caller. Escalate it where the fabricated precision is not acceptable:

warnings.filterwarnings('error', category=pv.PrecisionWarning)

or silence it where it is:

warnings.filterwarnings('ignore', category=pv.PrecisionWarning)

Either can be scoped to a block with warnings.catch_warnings, or set for a run from -W or a test runner’s own configuration.

Added in version 0.49.