Hi Steve/Joe, On 20 November 2011 00:09, Steven D'Aprano <st...@pearwood.info> wrote:
> Walter Prins wrote: > > pickle files are binary files and you probably opened it as a text file. >> See here: >> http://docs.python.org/py3k/**library/functions.html#open<http://docs.python.org/py3k/library/functions.html#open> >> > > Not so. Pickle protocol 0 is text, and it happens to be the default > protocol used if you don't instruct it different. So by default, pickles > are text unless you specifically use a binary protocol. Well I stand corrected, thanks! :) For some reason I thought they were binary by default too, but hey ho... will try to remember that for future reference. To Joe, another hint: Note that you can /directly/ pass the /file-like/ object returned by urllib directly to pickle.... So, pickle can effectively unpickle data read directly from the website (via a file-like object that actually reads from the webiste, not a real file), and you then needn't care what format the pickle file (on the website) is in... Neat eh? This by the way, is a small demonstration of "duck typing" -- Pickle doesn't really care whether what you pass into pickle.load() method is actually *really* a file object -- As long as it walks like a file, and quacks like a file, sufficiently well for pickle's purposes then everyone's happy and you get back an unpickled object... ;) Walter PS You can get the unpickled object in Python for this puzzle with between 1 and 3 lines of code, depending on how much nesting of calls you use...
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