擅长:python、mysql、java
<p>试试这个:</p>
<pre><code>msg = 'Starting weight of food (in lbs:ozs) = '
answer = input(msg).strip()
try:
pounds, ounces = answer.split(':')
pounds = float(pounds)
ounces = float(ounces)
except (ValueError) as err:
print('Wrong values: ', err)
print(pounds, ounces)
</code></pre>