[issue30190] unittest's assertAlmostEqual should show the difference

[Giampaolo Rodola']

New submission from Giampaolo Rodola':

When comparing 2 numbers as "self.assertAlmostEqual(a, b, delta=1000)" the error message looks like this:

    AssertionError: 27332885 != 27391120 within 1000 delta

Especially when a and b are big numbers or differ a lot, it would be useful to see the absolute difference between the 2 numbers as in:

    AssertionError: 27332885 != 27391120 within 1000 delta (58235 difference)

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messages: 292477
nosy: giampaolo.rodola
priority: normal
severity: normal
stage: needs patch
status: open
title: unittest's assertAlmostEqual should show the difference
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30190>
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