int object is not iterable i cant see the mistake [on hold]

this is a part of the code for i tic tac tie game i am programming but it has a problem with the vertwin+=map[k][k] if you need to see the full code tell me

vertwin+=map[k][k]

def wincond():
def winpri(list):
if list==['x','x','x']:
print('x wins')
t=0
elif list==['o','o','o']:
print('o wins')
t=0
for j in range(3):
vertwin=
sidewam=
winpri(map[i])
backside=
for k in range(3):
vertwin+=map[k][k]
sidewam+=map[k][j]
backside+=map[k][k-k*2]
winpri(vertwin)
winpri(sidewin)
winpri(backside)


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map

map[k][k]

listobject += integer

listobject.append(integer)