python3-imath binary package in openKylin Nile V2.0 amd64

 Imath is a basic, light-weight, and efficient C++ representation of
 2D and 3D vectors and matrices and other simple but useful
 mathematical objects, functions, and data types common in computer
 graphics applications, including the “half” 16-bit floating-point type.
 .
 Imath also includes optional Python bindings for all types and
 functions, including optimized implementations of vector and
 matrix arrays.
 .
 This package provides Python bindings to the Imath library.

Source package