code: def _sparse_blockify(tuples, dtype=None):
      
  
      new_blocks = []
      for i, names, array in tuples:
          array = _maybe_to_sparse(array)
          block = make_block(array, placement=[i])
          new_blocks.append(block)
  
      return new_blocks
docs: return an array of blocks that potentially have different dtypes (and
      are sparse)