A raise statement never returns control in the normal way. Instead, it transfers control to the innermost exception handler that can handle exceptions of the given class.

 
  • 如果发生的异常你的代码没有捕获,处理,那就将他踢出去(程序不必管了),送给操作系统,谁能处理谁处理!(通俗!嘻嘻)
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