[Python-Dev] When to use EOFError? (original) (raw)

Rob Cliffe rob.cliffe at btinternet.com
Sun Jun 26 20:22:49 EDT 2016

So how about an EmptyFileError (or similar name) as a subclass of EOFError?

On 26/06/2016 21:42, Guido van Rossum wrote:

I think this is an interesting idea and quite in line with the meaning of EOFError. --Guido (mobile) On Jun 26, 2016 5:02 AM, "André Malo" <nd at perlig.de_ _<mailto:nd at perlig.de>> wrote: * Serhiy Storchaka wrote: > On 22.06.16 19:22, André Malo wrote: > > I often concatenate multiple pickles into one file. When reading them, > > it works like this: > > > > try: > > while True: > > yield pickle.load(fp) > > except EOFError: > > pass > > > > In this case the truncation is not really unexpected. Maybe it should > > distinguish between truncated-in-the-middle and > > truncated-because-empty. > > > > (Same goes for marshal) > > This is interesting application, but works only for non-truncated data. > If the data is truncated, you just lose the last item without a notice. Yes (as said). In my case it's typically not a problem, because I write them myself right before reading them. It's a basically about spooling data to disk in order to keep them out of the RAM. However, because of the truncation issue it would be nice, to have a distinction between no-data and truncated-data. Cheers, -- Winnetous Erbe: <http://pub.perlig.de/books.html#apache2>

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