code: def insert_many(self, rows, chunk_size=1000, ensure=None, types=None):
          
          chunk = []
          for row in rows:
              row = self._sync_columns(row, ensure, types=types)
              chunk.append(row)
              if len(chunk) == chunk_size:
                  chunk = pad_chunk_columns(chunk)
                  self.table.insert().execute(chunk)
                  chunk = []
  
          if len(chunk):
              chunk = pad_chunk_columns(chunk)
              self.table.insert().execute(chunk)
docs: Add many rows at a time.
  
          This is significantly faster than adding them one by one. Per default
          the rows are processed in chunks of 1000 per commit, unless you specify
          a different ``chunk_size``.
  
          See :py:meth:`insert() <dataset.Table.insert>` for details on
          the other parameters.
          ::
  
              rows = [dict(name='Dolly')] * 10000
              table.insert_many(rows)