def __init__(self, qpart):
        self._qpart = qpart

        self.width = self._DEFAULT_INDENT_WIDTH
        self.useTabs = self._DEFAULT_INDENT_USE_TABS

        self._smartIndenter = _getSmartIndenter('normal', self._qpart, self)
def dfs(self,candidates,target,start,reslist):
        length = len(candidates)
        if target == 0: 
            return self.result.append(reslist)