Created by: Superjomn

• should the python syntax be exactly the same with V2 API?

  • currently, we have some new concept such as executor, default_program, fetch_list
  • some new concepts bring flexibility(such as while op) and are hard to hide as the underlying of V2 API.

• when the book based on Fluid is completed, should we discard the old V2 content?

  • during migration, new content will be placed to a chapter_xxx_fluid directory
  • the new Fluid content can co-exist with the V2 content.
  • if we want to drop V2 content, just replace them with chapter_xxx_fluid.