1.45-1 不等于 0.45 ，具体看图，该怎么办？
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chengzhoukun Sep 3, 2015  1
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codercai Sep 5, 2015 1
然而这并不奇怪，机器存储浮点数本来就是个近似值，而非精确值
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3
Sinic Sep 7, 2015 1
遇到这种情况，使用
>>> from decimal import Decimal >>> Decimal ('1.45') - 1 Decimal ('0.45') >>> (Decimal ('1.45') - 1 ) * 2 Decimal ('0.90') |
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