擅长:python、mysql、java
<p>你应该在函数中提示一下。这是编写此类验证的标准习惯用法:</p>
<pre><code>def validate():
while True:
# begin inf. loop
p = input("some prompt goes here")
if some_validation:
break
# end inf. loop
# therefore if the validation fails, it reprompts
# once you're out of the inf. loop...
return p
</code></pre>
<p>这是你可以建造一个很好的装饰工的东西之一</p>
^{pr2}$