在python中处理异常

问题描述

处理异常的最佳方法是什么.

What the best way of handling exceptions.

class SRException(Exception):
    default_exception = True

    def somefun1(email):
        try:
            user = somefun2(email)
        except Exception, e:
            raise SRException, ("could not find the email", e)

    def somefun2(email):
        try:
            user = User.objects.get(email = email)
        except Exception, e:
            raise SRException, ("could not find the user objecets",e )

所以当发生异常时，我会获得一长串的异常

So when exception happens I get a long list of Exception

错误和上面的代码示例不相同.但是我想我已经说清楚了.

Error and above code examples are not the same. But I guess I made my point clear.

那么处理异常的最佳方法是什么.我是否应该在所有例外情况中都提出这一点.每当发生异常时，我都会向技术团队发送邮件.

So what the best way of handling exceptions.Should I not raise it in every exceptions. And I am sending mail to technical team every time exceptions occurs.

推荐答案

通常不必在调用堆栈的每个级别都包装异常.您最好在调用堆栈中某个较高的位置捕获异常，并将堆栈跟踪信息转储到技术支持电子邮件中.这将非常清楚地表明问题出在哪里以及从何处被调用.

It is usually not necessary to wrap exceptions at every level of the call stack. You are better off catching exceptions somewhere high up in the call stack and dumping a stack trace into the tech-support email. This will indicate quite clearly where the problem occurred and where it was called from.

在 sys.exc_info()[2] 中进行一些挖掘，您甚至可以在每个堆栈框架中转储完整的参数和局部变量列表，这将为支持人员提供令人讨厌的电子邮件地址.

With a bit of digging around in sys.exc_info()[2], you could even dump a complete list of parameters and locals in each stack frame, which would give support staff the offending email address.

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