Allow accessing return value inside finally clause
Say I have this function: def f(): try: return whatever() finally: pass # I want to get what `whatever()` returned in here I want to get the return value from inside the `finally` clause. I understand that this is currently not possible. I'd like that to be possible because that would allow post-processing of a function's return value. What do you think? Thanks, Ram.
On 12/25/2012 10:46 PM, Ram Rachum wrote:
Please supply a more complete example of what you are trying to achieve. As it is, I wonder what your motivation is for using a "finally", because in the case of an exception, there won't even *be* a return value to postprocess. If you're trying to use try-finally as a sort of nonlocal exit mechanism (like the famous "goto done" in CPython sources), you probably would be fine with ret = None try: if x: ret = blah return # more cases with returns here finally: # post-process ret here return ret But I would consider this an abuse of try-finally, especially since it suppresses proper propagation of exceptions. cheers, Georg
On 26/12/12 08:46, Ram Rachum wrote:
The usual ways to do that are: def f(): return postprocess(whatever()) or: def f(): return whatever() x = postprocess(f()) Are these usual solution not suitable for your use-case? -- Steven
On 12/25/2012 10:46 PM, Ram Rachum wrote:
Please supply a more complete example of what you are trying to achieve. As it is, I wonder what your motivation is for using a "finally", because in the case of an exception, there won't even *be* a return value to postprocess. If you're trying to use try-finally as a sort of nonlocal exit mechanism (like the famous "goto done" in CPython sources), you probably would be fine with ret = None try: if x: ret = blah return # more cases with returns here finally: # post-process ret here return ret But I would consider this an abuse of try-finally, especially since it suppresses proper propagation of exceptions. cheers, Georg
On 26/12/12 08:46, Ram Rachum wrote:
The usual ways to do that are: def f(): return postprocess(whatever()) or: def f(): return whatever() x = postprocess(f()) Are these usual solution not suitable for your use-case? -- Steven
participants (3)
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Georg Brandl -
Ram Rachum -
Steven D'Aprano