python - Typeerror:list indices must be integers, not tuple -

i have got error in type of indices. tried run code got complied error can see in python idle below.

the code:

def triples(self, (sub, pred, obj)):      #generator on triple store.     #returns triples match given triple pattern.       # check terms present in order use correct index:     try:         if sub != none:              if pred != none:                 # sub pred obj                 if obj != none:                     if obj in self._spo[sub][pred]: yield (sub, pred, obj)                 # sub pred none                 else:                     retobj in self._spo[sub][pred]: yield (sub, pred, retobj)             else:                 # sub none obj                 if obj != none:                     retpred in self._osp[obj][sub]: yield (sub, retpred, obj)                 # sub none none                 else:                     retpred, objset in self._spo[sub].items():                         retobj in objset:                             yield (sub, retpred, retobj)         else:             if pred != none:                 # none pred obj                 if obj != none:                     retsub in self._pos[pred][obj]:                         yield (retsub, pred, obj)                 # none pred none                 else:                     retobj, subset in self._pos[pred].items():                         retsub in subset:                             yield (retsub, pred, retobj)             else:                 # none none obj                 if obj != none:                     retsub, predset in self._osp[obj].items():                         retpred in predset:                             yield (retsub, retpred, obj)                 # none none none                 else:                     retsub, predset in self._spo.items():                         retpred, objset in predset.items():                             retobj in objset:                                 yield (retsub, retpred, retobj)     # keyerrors occur if query term wasn't in index, yield nothing:     except keyerror:         pass 

the following error after executing in python idle. error got thought indices in python idle.

list(movie_graph.triples(("blade_runner","directed_by",none))) [("blade_runner","directed_by","ridle_scott")]

traceback (most recent call last) file "", line 1, in list(movie_graph.triples(("blade_runner","directed_by",none)))[("blade_runner","directed_by","ridle_scott")] typeerror: list indices must integers, not tuple

the error getting unrelated triples function. line in erroneous:

list(movie_graph.triples(("blade_runner","directed_by",none))) [("blade_runner","directed_by","ridle_scott")] 

list(...) returns list, , following square brackets, [...], attempting index list. list index must integer, not ("blade_runner","directed_by","ridle_scott"), tuple, hence error seeing.

it's hard see trying achieve, that's why you're seeing error.