def pathFinder(W,q=inf):
nr = len(W); PF = W
Z = MatClosure(W)
for u in range(nr):
for v in range(nr):
pf = []
# for t in T:
# if Z[u][v][t] != W[u][v][t]: pf.append(W[u][v][t])
PF[u][v] = pf
return(PF)