擅长:python、mysql、java
<p>像这样:</p>
<pre><code>score = None
while score is None:
try:
score = float(input("Please write the score you got on the test, 0-10: "))
except ValueError:
continue
</code></pre>
<p>继续询问,直到<code>float</code>转换工作,而不引发<code>ValueError</code>异常。你知道吗</p>