def main(self):
for line in self.file:
char_list = []
for c in line[0:9]:
char_list.append(c)
self.puzzle.append(char_list)
dlx = DLX(self.puzzle)
if dlx.solve():
self.puzzle = dlx.get_puzzle()
self.str_list = []
for m in self.puzzle:
print "".join(m)
self.str_list.append("".join(m))
self.puzzle = self.str_list
if Sudoku.check_matrix(self):
print "solved"
else:
print "not a valid puzzle"
