<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _AssTuple(self, t):
 """ Tuple on left hand side of an expression. """


        # _write each elements, separated by a comma.
        for element in t.nodes[:-1]:
            self._dispatch(element)
            self._write(", ")

        # Handle the last one without writing comma
        last_element = t.nodes[-1]
        self._dispatch(last_element)