python unittest2 assertAlmostEqual with `places` works incorrectly

I am dealing with the following problem with unittest2:

assertAlmostEqual(69.88, 69.875, places=2)  # returns True

but

assertAlmostEqual(1.28, 1.275, places=2)  # returns False

I think problem is in the assertAlmostEqual method:

def assertAlmostEqual(self, first, second, places=None, ...):
    if first == second:
        # shortcut
        return
    ...
    if delta is not None:
    ...
    else:
        if places is None:
            places = 7

        if round(abs(second-first), places) == 0:
            return

    ...
    raise self.failureException(msg)

Should it instead be:

if abs(round(second, places) - round(first, places)) == 0
    return

Your proposed fix doesn't make any difference, as you can easily demonstrate:

>>> places = 2
>>> first, second = 69.88, 69.875
>>> round(abs(second-first), places)
0.0
>>> abs(round(second, places) - round(first, places))
0.0

This is a problem with floating point precision, see e.g. Is floating point math broken? 69.88 cannot be represented exactly:

>>> "{:.40f}".format(69.88)
'69.8799999999999954525264911353588104248047'