Create objects in Blender using Metaclasses

blender_object_creation.py

import bpy
import numpy as np
from numpy import (sin, cos, pi)

def remove_from(data, name):
    if name in data:
        data.remove(data[name])

class BObjectMeta(type):
    def __new__(cls, name, bases, dct):
        for attr in ["vertices", "edges", "faces"]:
            if attr not in dct:
                dct[attr] = []
        x = super().__new__(cls, name, bases, dct)
        if name == "BObject":
            return x
        x.name = name
        x.mesh_name = f"{name} mesh"
        remove_from(bpy.data.meshes, x.mesh_name)
        remove_from(bpy.data.objects, x.name)
        x.mesh = bpy.data.meshes.new(x.mesh_name)
        x.object = bpy.data.objects.new(x.name, x.mesh)
        x.mesh.from_pydata(x.vertices, x.edges, x.faces)
        bpy.data.collections[0].objects.link(x.object)
        return x

class BObject(metaclass=BObjectMeta):
    pass

class Triangle(BObject):
    vertices = [(0, 0, 0), (0, 2, 0), (0, 1, 2)]
    faces = [(0, 1, 2)]

class Disc(BObject):
    vertices = [(cos(t), sin(t), 0) for t in np.linspace(0, 2*pi, 20)]
    faces = [range(20)]