Author tim.peters
Recipients cffk, rhettinger, tim.peters
Date 2021-01-31.23:16:38
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Message-id <1612134998.59.0.793494584567.issue43088@roundup.psfhosted.org>
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I agree this doesn't occur in 3.10, but think Raymond pasted wrong outputs. Here:

Python 3.10.0a4+ (heads/master:64fc105b2d, Jan 28 2021, 15:31:11)
[MSC v.1928 64 bit (AMD64)] on win32
>>> x  = 0.6102683302836215
>>> y1 = 0.7906090004346522
>>> y2 = y1 + 1e-16
>>> from math import hypot
>>> hypot(x, y1)
0.998744224772008
>>> hypot(x, y2)
0.9987442247720081

Those both appear to be the results "as if" computed to infinite precision and then correctly rounded back to Python's float precision.
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Date User Action Args
2021-01-31 23:16:38tim.peterssetrecipients: + tim.peters, rhettinger, cffk
2021-01-31 23:16:38tim.peterssetmessageid: <1612134998.59.0.793494584567.issue43088@roundup.psfhosted.org>
2021-01-31 23:16:38tim.peterslinkissue43088 messages
2021-01-31 23:16:38tim.peterscreate