math_isinf.py

import math

print '{:^3} {:6} {:6} {:6}'.format('e', 'x', 'x**2', 'isinf')
print '{:-^3} {:-^6} {:-^6} {:-^6}'.format('', '', '', '')

for e in range(0, 201, 20):
    x = 10.0 ** e
    y = x * x
    print '{:3d} {!s:6} {!s:6} {!s:6}'.format(e, x, y, math.isinf(y),)