def slice(self, start=None, end=None, step=None):
        """Slice of this element's childs as childs[start:end:step]"""
        return self.childs[start:end:step]
def slice ( self , start = None , end = None , step = None ) : return self . childs [ start : end : step ]
Slice of this element's childs as childs[start:end:step]