擅长:python、mysql、java
<p>引发异常:<a href="http://docs.python.org/tutorial/errors.html" rel="nofollow">http://docs.python.org/tutorial/errors.html</a></p>
<blockquote>
<p>Even if a statement or expression is syntactically correct, it may cause an error when an attempt is made to execute it. Errors detected during execution are called <em>exceptions</em> and are not unconditionally fatal... Most exceptions are not handled by programs, however, and result in error messages...</p>
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