MagicSquare.py

class MagicSquare():
    def __init__(self, n):
        assert(n % 2 == 1)

        self.n = n
        self.matrix = list(
            map(lambda _:
                list(map(lambda _: 0, list(range(1, n+1)))),
                range(1, n+1)))

        self.__construct()

    def __construct(self):
        current_row = self.n // 2 + 1
        current_col = self.n // 2

        for i in range(1, self.n * self.n + 1):
            self.matrix[current_row][current_col] = i

            next_row = (current_row + 1) % self.n
            next_col = (current_col + 1) % self.n

            if(self.matrix[next_row][next_col] != 0):
                current_row = (current_row + 2) % self.n
            else:
                current_row = next_row
                current_col = next_col

    def __str__(self):
       return "\n".join(map(str, self.matrix))

if(__name__ == '__main__'):
    print(str(MagicSquare(7)))