[Tutor] pickle problem

[Joel Goldstick]

On Tue, Oct 12, 2010 at 1:35 PM, Roelof Wobben <rwobben at hotmail.com> wrote:

>
>
> Hello,
>
> I have this code :
>
> import urllib
> import pickle
>
> image = urllib.URLopener()
> image.retrieve("http://www.pythonchallenge.com/pc/def/peak.html","banner.p"
> )
> plaatje = open("banner.p", "rb")
> plaatje2 = pickle.load(plaatje)
>
> But it gives this output :
>
> Traceback (most recent call last):
>  File "C:\Users\wobben\workspace\oefeningen\src\test2.py", line 7, in
> <module>
>    plaatje2 = pickle.load(plaatje)
>  File "C:\Python27\lib\pickle.py", line 1378, in load
>    return Unpickler(file).load()
>  File "C:\Python27\lib\pickle.py", line 858, in load
>    dispatch[key](self)
> KeyError: '<'
>
>
> What does this mean ?
>

I have heard of pickle, but never used it.  I looked it up in Learning
Python (O'Reilley p 236).  The example they give shows that you need to
pickle your object, and put it in a file with pickle(dump(D,F) where D is a
dictionary in the example and F is a file object.  You then can retrieve it
with pickle.load(F).  The thing you are trying to load is a file that was a
copy of the contents of the url.  It is html, and not 'pickled'

I think you are missing a line or two of code from your example tutorial

>
> Roelof
>
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-- 
Joel Goldstick
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