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Created on 2018-05-27 03:38 by voidptr, last changed 2022-04-11 14:59 by admin. This issue is now closed.
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| msg317779 - (view) | Author: voidptr (voidptr) | Date: 2018-05-27 03:38 | |
help in python 3.6.5 z = 1787.4 + 6.2 gives me z = 1793.600000000001 in python 2.7.15 gives z = 1793.6 I dont want explicitly round float thing every time so I went back to 2.7.15.... |
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| msg317780 - (view) | Author: Raymond Hettinger (rhettinger) *  |
Date: 2018-05-27 04:17 | |
The math hasn't changed. The underlying values haven't changed. What did change what that the __str__ now displays to full precision. Formerly, it used to display a rounded result that didn't reflect the actual stored value. $ python2.7 Python 2.7.15 (v2.7.15:ca079a3ea3, Apr 29 2018, 20:59:26) [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> z = 1787.4 + 6.2 >>> repr(z) '1793.6000000000001' >>> str(z) '1793.6' $ python3.6 Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 03:03:55) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> z = 1787.4 + 6.2 >>> repr(z) '1793.6000000000001' >>> str(z) '1793.6000000000001' |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:00 | admin | set | github: 77838 |
| 2018-05-27 04:17:04 | rhettinger | set | status: open -> closed nosy: + rhettinger messages: + msg317780 resolution: not a bug stage: resolved |
| 2018-05-27 03:44:15 | eitan.adler | set | nosy:
+ eitan.adler |
| 2018-05-27 03:38:09 | voidptr | create | |