is symmetric list | Python Fiddle

def is_a_square_list_of_lists(my_list):
    if isinstance(my_list, list):
        size = len(my_list)
        for row in my_list:
            if len(row) != size:
                return False
        return True
    else:
        return False

def initialize_square_list_of_lists(size):
    result = []
    for i in range(size):
        result.append([])
    for i in range(size):
        for j in range(size):
            result[i].append(0)
    return result

def columns(input_list):
    result = initialize_square_list_of_lists(len(input_list))
    size = len(input_list)
    if not is_a_square_list_of_lists(input_list):
        return "not square_lol"
    for i in range(size):
        for j in range(size):
            result[i][j] = input_list[j][i]
    return result

def is_symmetrical_list(input_list):
    return input_list == columns(input_list)

def test():
    test_cases = [
                  ([[1, 2, 3], [2, 3, 1], [3, 1, 2]], True), 
                  ([[1, 2, 3], [2, 3, 1], [3, 1, 10-8]], True), 
                  ([[1, 2, 3], [1, 2, 3], [1, 2, 3]], True), 
                  ([[1]], True), 
                  ([['a']], True), 
                  ([[[0, 1, 2]]], True), 
                  ([[('name', 'rank', 'serial number')]], True), 
                  ([[]], False), 
                 ]
    passes = 0
    for (args, expected_result) in test_cases:
        result = is_a_square_list_of_lists(args)
        if result != expected_result:
            print "Failed when input was: ", args, ".  Expected: ", expected_result, " Got: ", result
        else:
            passes = passes + 1
    print passes, " out of ", len(test_cases), " test cases passed."

test()

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