code: def create_table_index(self, key, **kwargs):
          
  
          # version requirements
          _tables()
          s = self.get_storer(key)
          if s is None:
              return
  
          if not s.is_table:
              raise TypeError(
                  "cannot create table index on a Fixed format store")
          s.create_index(**kwargs)
docs: Create a pytables index on the table
          Parameters
          ----------
          key : object (the node to index)
  
          Exceptions
          ----------
          raises if the node is not a table