code: def build_vars(path=None):
          
          init_vars = {
              "__name__": "__main__",
              "__package__": None,
              "reload": reload,
          }
          if path is not None:
              init_vars["__file__"] = fixpath(path)
          # put reserved_vars in for auto-completion purposes
          for var in reserved_vars:
              init_vars[var] = None
          return init_vars
docs: Build initial vars.