Blender2.8 bake shape key to mesh

shape_key_bake.py

import bmesh
base_key = obj.data.shape_keys.reference_key
for index, shape_key in enumerate(obj.data.shape_keys.key_blocks):
  if shape_key == base_key:
    continue
  obj.show_only_shape_key = True
  obj.active_shape_key_index = index
  bpy.context.scene.update()
  shape_key_mesh = obj.to_mesh(bpy.context.view_layer.depsgraph, apply_modifiers=True, calc_undeformed=True)
  obj.show_only_shape_key = False
  tri_mesh = bmesh.new()
  tri_mesh.from_mesh(shape_key_mesh)
  bmesh.ops.triangulate(tri_mesh, faces=tri_mesh.faces, quad_method="ALTERNATE")
  tri_mesh.to_mesh(shape_key_mesh)
  tri_mesh.free()
  shape_key_mesh.update(calc_loop_triangles=True)
  if obj.data.uv_layers:
    shape_key_mesh.calc_tangents()
  else:
    shape_key_mesh.calc_normals_split()
  new_obj = bpy.data.objects.new('shape_key_mesh', shape_key_mesh) 
  bpy.context.view_layer.active_layer_collection.collection.objects.link(new_obj)