def _H(x):

    x1=str(x)

    x2=x1[::-1]

    return x1==x2

print(list(filter(_H,range(0,100))))

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99]