异常处理的核心目的是让程序在遇到错误时能够优雅地恢复或退出，而不是直接崩溃。

In our example, Python offers two ways to access the exception information. For both, the Python script first must have import sys before the try: .. except: portion of the code.

In Python, a SyntaxError happens when the interpreter finds code that does not conform to the rules of the Python language.

Official support for free-threaded Python, an experimental JIT, and a smarter installation manager for Windows are among the goodies in Python 3.14. Now in a release candidate.