擅长:python、mysql、java
<p>我相信这实际上是python中预期的行为,而不是浮点问题。看看<a href="https://docs.python.org/3/library/functions.html#round" rel="nofollow noreferrer">documentation</a>:</p>
<blockquote>
<p>if two multiples are equally close, rounding is done toward the even choice (so, for example, both round(0.5) and round(-0.5) are 0, and round(1.5) is 2)</p>
</blockquote>