Add UV Project modfier with projectors

import bpy
from mathutils import Vector

directions = [
    Vector((1.0, 0.0, 0.0)),
    Vector((-1.0, 0.0, 0.0)),
    Vector((0.0, 1.0, 0.0)),
    Vector((0.0, -1.0, 0.0)),
    Vector((0.0, 0.0, 1.0)),
    Vector((0.0, 0.0, -1.0)),
]

def add_projectors():
    bpy.ops.object.modifier_add(type='UV_PROJECT')
    bpy.context.object.modifiers["UVProject"].projector_count = len(directions)
    center = bpy.data.objects.new( "empty", None )
    bpy.context.scene.collection.objects.link(center)
    center.empty_display_type = 'CUBE'
    for i in range(len(directions)):
        axis = bpy.data.objects.new( "empty", None )
        axis.empty_display_types = 'SINGLE_ARROW'
        bpy.context.scene.collection.objects.link(axis)
        axis.rotation_mode = 'QUATERNION'
        axis.rotation_quaternion = directions[i].to_track_quat('Z','Y')
        axis.parent = center
        bpy.context.object.modifiers["UVProject"].projectors[i].object = axis

add_projectors()