code: def assert_frame_equal(left, right, data_function=None, data_args=None):
      
      if data_function:
          data_args = {} if not data_args else data_args
          data_function(left.data, right.data, **data_args)
      else:
          assert left.data == right.data
      assert left.index == right.index
      assert left.columns == right.columns
      assert left.index_name == right.index_name
      assert left.sort == right.sort
      assert left.blist == right.blist
docs: For unit testing equality of two DataFrames.
  
      :param left: first DataFrame
      :param right: second DataFrame
      :param data_function: if provided will use this function to assert compare the df.data
      :param data_args: arguments to pass to the data_function
      :return: nothing