Python - exact same loop works inconsistently 'int' object is not iterable - not iterating over int -

i need run loop twice in function 2 different things. works fine in 1 place fails run in other, though there no discernible difference between two.

this loop

for each in problem.getsuccessors(coord): #each in [((x,y), 'dir', num)...] 

it runs fine second time, giving me correct solution,

def recursivedfs(coord, stck, actions, visited, problem):     repush = false     print "iterate", problem.getsuccessors(coord)     each in problem.getsuccessors(coord): #each in [((x,y), 'dir', num)...]         if not each[0] in visited:             repush = true      if repush:         stck.push(coord)      if problem.isgoalstate(coord):         print coord, " goal state"         return stck     else:         if coord in visited:             print "revisited ", coord         else:             visited.append(coord)             print "visited ", coord          print "iterate", problem.getsuccessors(coord)             each in problem.getsuccessors(coord): #each in [((x,y), 'dir', num)...]             if not each[0] in visited:                 print "pushed ", each                 stck.push(each)                 return recursivedfs(each[0], stck, actions, visited, problem)          new = stck.pop()         print "popped ", new         return recursivedfs(new[0], stck, actions, visited, problem) 

here screenshots detailing error. can't imagine what's different between first loop , second.

the second loop works fine

when uncomment first, seems think iterating on int.

what's difference?

some additional info error on line 197 of searchagents: addressing function getsuccessors, should return attempting iterate over. should (and in case of second loop is) tuple containing: [(x, y), "direction", int] x , y ints.

def getsuccessors(self, state):      successors = []     action in [directions.north, directions.south, directions.east,    directions.west]:         x,y = state         dx, dy = actions.directiontovector(action)         nextx, nexty = int(x + dx), int(y + dy)         if not self.walls[nextx][nexty]:             nextstate = (nextx, nexty)             cost = self.costfn(nextstate)             successors.append( ( nextstate, action, cost) )      # bookkeeping display purposes     self._expanded += 1 # not change     if state not in self._visited:         self._visited[state] = true         self._visitedlist.append(state)      return successors 

edited: looked on issue not in loop, part right below first loop pushes coord stck.

if repush:     stck.push(coord) 

this coordinate instead of each intended push, means @ end of function when pop out calling new fails since coord. can't suggest full solution since i'm not sure majority of code doing why output has "popped (3,5)" right before error raised , why first element of integer instead of coordinate.