擅长:python、mysql、java
<p>这确实是由于<a href="https://docs.python.org/3/tutorial/floatingpoint.html#tut-fp-issues" rel="nofollow noreferrer">floating point arithmetic</a>,如Python 3<a href="https://docs.python.org/3/library/functions.html#round" rel="nofollow noreferrer">documentation for ^{<cd1>}</a>中所述,其中指出:</p>
<blockquote>
<p>The behavior of <code>round()</code> for floats can be surprising: for example, <code>round(2.675, 2)</code> gives <code>2.67</code> instead of the expected <code>2.68</code>. This is not a bug: it’s a result of the fact that most decimal fractions can’t be represented exactly as a float.</p>
</blockquote>