Nicolas Fleury wrote:
> Hi,
> I've made a small utility to re-raise an exception with the same stack
> as before with additional information in it. Since I want to keep the
> same exception type and that some types have very specific constructors
> (which take, for example, more than one parameter), the only safe way I
> have found to made it is by hacking the str representation:
>
>
> import sys
>
> class ExceptionStr:
> def __init__(self, content):
> self.content = content
> self.infos = []
> def addinfo(self, info):
> self.infos.insert(0, info)
> def __call__(self):
> return '\n' + '\n'.join(self.infos + [self.content])
>
> def reraise(exception, additionalInfo):
> strFunc = getattr(exception, "__str__", None)
> if not isinstance(strFunc, ExceptionStr):
> strFunc = ExceptionStr(str(exception))
> exception.__str__ = strFunc
> strFunc.addinfo(additionalInfo)
> raise exception, None, sys.exc_info()[-1]
>
How about dropping reraise and changing:
reraise(...)
to:
addinfo(...)
raise
Where addinfo looks like:
def addinfo(exception, additionalInfo):
strFunc = getattr(exception, "__str__", None)
if not isinstance(strFunc, ExceptionStr):
strFunc = ExceptionStr(str(exception))
exception.__str__ = strFunc
strFunc.addinfo(additionalInfo)
So you finale would be:
if __name__ == '__main__':
def foo():
raise AttributeError('Test')
def bar():
foo()
try:
try:
try:
bar()
except Exception, exception:
addinfo(exception, "While doing x:")
raise
except Exception, exception:
addinfo(exception, "While doing y:")
raise
except Exception, exception:
addinfo(exception, "While doing z:")
raise
--Scott David Daniels
[EMAIL PROTECTED]
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