15. Floating-Point Arithmetic: Issues and Limitations — Python 3.14.7 documentation
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2026-07-18 09:46:52
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划选高亮2026-07-18 16:10:52
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“there are no easy answers”
Whisper 随想笔记
Yeah, but knowing that doesn't make debugging floats any less painful.
划选高亮2026-07-18 13:07:52
原文高亮摘录
“0.1 cannot be represented exactly as a base 2 fraction”
Whisper 随想笔记
Wait, but my calculator shows 0.1 fine, so why does Python have this problem? Seems like a bug.
划选高亮2026-07-18 12:58:52
原文高亮摘录
“0.1 cannot be represented exactly as a base 2 fraction”
Whisper 随想笔记
So that's why 0.1 + 0.2 is never exactly 0.3, it's kind of mind-blowing when you first get it.
划选高亮2026-07-18 10:04:52
原文高亮摘录
“Unfortunately”
Whisper 随想笔记
I learned this the hard way when my accounting calc broke.
划选高亮2026-07-18 09:55:52
原文高亮摘录
“Unfortunately”
Whisper 随想笔记
But like, does it really matter for most apps though?
划选高亮2026-07-18 09:46:52
原文高亮摘录
“Unfortunately”
Whisper 随想笔记
Yeah, 0.1 + 0.2 still hits me every time.
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