<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _convert_clipboard(self, datastring=None, sep='\t'):
 """Converts data string to iterable. Parameters: datastring: string, defaults to None \tThe data string to be converted. \tself.get_clipboard() is called if set to None sep: string \tSeparator for columns in datastring """


        if datastring is None:
            datastring = self.get_clipboard()

        data_it = ((ele for ele in line.split(sep))
                            for line in datastring.splitlines())
        return data_it