<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _hide_popup(self):
 """ Hides the completer popup """

        debug('hide popup')
        if (self._completer.popup() is not None and
                self._completer.popup().isVisible()):
            self._completer.popup().hide()
            self._last_cursor_column = -1
            self._last_cursor_line = -1
            QtWidgets.QToolTip.hideText()