Hi Mashiat, > On May 12, 2015, at 9:53 AM, Mashiat Sarker Shakkhar > <mashiat.sar...@gmail.com> wrote: > > Hi > > If I want to trap a certain type of exception in a deferred call, how do I > specify it? For example, I see a failure like this: > > [HTTP11ClientProtocol (TLSMemoryBIOProtocol),client] > [<twisted.python.failure.Failure <class 'OpenSSL.SSL.Error'>>] > [HTTP11ClientProtocol (TLSMemoryBIOProtocol),client] Traceback (most > recent call last): > [HTTP11ClientProtocol (TLSMemoryBIOProtocol),client] Failure: > twisted.web._newclient.ResponseNeverReceived: [<twisted.python. > failure.Failure <class 'OpenSSL.SSL.Error'>>] > > I want to trap all such failures. I tried > `failure.trap(twisted.web._newclient.ResponseNeverReceived)` but looks like > that did not work. My deferred callback looks like this: > > from twisted.internet.error import TimeoutError > from twisted.web._newclient import ResponseNeverReceived > def log_ignore_network_errors(failure): > print failure.getErrorMessage() > failure.printTraceback() > failure.trap(TimeoutError, ResponseNeverReceived) > > Apparently this does not catch all such errors. What am I doing wrong here? > This code sample does not indicate that you have actually assigned log_ignore_network_errors as an errback on a Deferred anywhere. If you can provide a working code example that demonstrates your issue, it will be easier to help you :)
L. Daniel Burr
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