[Tutor] Cannot cPickle.load()

[Liam Clarke]

 myfilep=open("e:\Devel\listpickled", "r")
> >>> myfilep
> <open file 'e:\Devel\listpickled', mode 'r' at 0x00AA05A0>
> >>> mydict = cPickle.load(myfilep)

Have you tried - 

mypick = pickle.Unpickler(myfilep)
mydict =mypick.load()

I think that's how you do it.

On Tue, 30 Nov 2004 18:47:26 -0600, Hugo González Monteverde
<hugonz-lists at h-lab.net> wrote:
> 
> 
> Hi Tutors,
> 
> I think I must be missing something here. I pickled a dictionary of
> lists into a file, using protocol 2, some weeks ago.  Now I'm trying to
> load it and I can't.
> 
> File is 21kB long, so I know it has data in it, and when I read it into
> a string (without pickling) I understand the pickle is there. Here's  my
> log:
> 
> IDLE 1.0.3
> >>> import cPickle
> >>> import pickle
> >>> myfilep=open("e:\Devel\listpickled", "r")
> >>> myfilep
> <open file 'e:\Devel\listpickled', mode 'r' at 0x00AA05A0>
> >>> mydict = cPickle.load(myfilep)
> 
> Traceback (most recent call last):
>    File "<pyshell#4>", line 1, in -toplevel-
>      mydict = cPickle.load(myfilep)
> EOFError
> >>> myfilep.tell()
> 4096L
> >>> myfilep.seek(0)
> >>> mydict= pickle.load(myfilep)
> 
> Traceback (most recent call last):
>    File "<pyshell#7>", line 1, in -toplevel-
>      mydict= pickle.load(myfilep)
>    File "C:\Python23\lib\pickle.py", line 1390, in load
>      return Unpickler(file).load()
>    File "C:\Python23\lib\pickle.py", line 872, in load
>      dispatch[key](self)
>    File "C:\Python23\lib\pickle.py", line 1189, in load_binput
>      i = ord(self.read(1))
> TypeError: ord() expected a character, but string of length 0 found
> >>> myfilep.tell()
> 512L
> >>> myfilep.seek(0)
> >>> mystring = myfilep.read()
> >>> mystring
> '\x80\x02]q\x01(U\x05Aaronq\x02U\x04Abelq\x03U\x08Abelardoq\x04U\x07Abelinoq\x05U\x07Abigailq\x06U\x07Abrahamq\x07U\x05Abrilq\x08U\x06Abundiq\tU\x03Adaq\nU\x05Adahiq\x0bU\x06Adalayq\x0cU\tAdalbertoq\rU\x08Adalgisaq\x0eU\x06Adalidq\x0fU\x07Adamariq\x10U\x04Adelq\x11U\x05Adelaq\x12U\x08Adelaidaq\x13U\x07Adelinaq\x14U\x06Adizonq\x15U\x06Adolfoq\x16U\x06Adonayq\x17U\x06Adrianq\x18U\x07Adrianaq\x19U\x04Ad\xe1nq'
> >>> #But this is not the full contents of the file!
> >>> myfilep.tell()
> 20480L
> >>> len(mystring)
> 257
> >>> mystring = myfilep.read()
> >>> len(mystring)
> 157
> >>> mystring = myfilep.read()
> >>> len(mystring)
> 0
> >>> #ok, done with the reading
> >>>
> 
> I cannot make any sense of it. Both implementations of load() tell me
> they're encountering EOF right away. If I use read, there's the pickled
> data, but I cannot read the entire file into the variable.
> 
> Please help if possible. I don't know what elese to do... (!)
> 
> Hugo
> 
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
> 


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