def __delitem__(self, item):
        if isinstance(item, (long, int)):
            try:
                del self._questions[item]
            except __HOLE__:
                raise ValueError("Tree hasn't branch for %r" % item)
        else:
            raise TypeError('Bad index')
dataset/ETHPy150Open uci-cbcl/tree-hmm/gmtkParam/__init__.py/TreeBranch.__delitem__