code: def copy(self, selection, getter=None, delete=False):
          
  
          if getter is None:
              getter = self._get_code
  
          tab = self.grid.current_table
  
          selection_bbox = selection.get_bbox()
  
          if not selection_bbox:
              # There is no selection
              bb_top, bb_left = self.grid.actions.cursor[:2]
              bb_bottom, bb_right = bb_top, bb_left
          else:
              replace_none = self.main_window.grid.actions._replace_bbox_none
              (bb_top, bb_left), (bb_bottom, bb_right) = \
                  replace_none(selection.get_bbox())
  
          data = []
  
          for __row in xrange(bb_top, bb_bottom + 1):
              data.append([])
  
              for __col in xrange(bb_left, bb_right + 1):
                  # Only copy content if cell is in selection or
                  # if there is no selection
  
                  if (__row, __col) in selection or not selection_bbox:
                      content = getter((__row, __col, tab))
  
                      # Delete cell if delete flag is set
  
                      if delete:
                          try:
                              self.grid.code_array.pop((__row, __col, tab))
  
                          except KeyError:
                              pass
  
                      # Store data
  
                      if content is None:
                          data[-1].append(u"")
  
                      else:
                          data[-1].append(content)
  
                  else:
                      data[-1].append(u"")
  
          return "\n".join("\t".join(line) for line in data)
docs: Returns code from selection in a tab separated string
  
          Cells that are not in selection are included as empty.
  
          Parameters
          ----------
  
          selection: Selection object
          \tSelection of cells in current table that shall be copied
          getter: Function, defaults to _get_code
          \tGetter function for copy content
          delete: Bool
          \tDeletes all cells inside selection