擅长:python、mysql、java
<pre><code>if value >= grade_boundaries['A'][0] and value <= grade_boundaries['A'][1]:
print("value is in grade A")
</code></pre>
<p>如果您愿意,也可以同时提取两个边界:</p>
^{pr2}$
<p>如果要同时比较:</p>
<pre><code>for grade in grade_boundaries:
if value >= grade_boundaries[grade][0] and value <= grade_boundaries[grade][1]:
print("value is in grade " + grade)
</code></pre>