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X = open('filename.dat', 'rb')
Y = cPickle.load(x)

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    Y.__dict__
AttributeError: 'tuple' object has no attribute '__dict__'

<type 'tuple'>

['__add__', '__class__', '__contains__', '__delattr__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getslice__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'count', 'index']

>>> import Pickle
Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    import Pickle
ImportError: No module named Pickle

80 02 4B 02 7D 71 01 86 2E

>>> import cPickle
>>> file = open('X.dat', 'rb')
>>> tup = cPickle.load(file)
>>> tup
(2, {})

['__add__', '__class__', '__contains__', '__delattr__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getslice__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'count', 'index'

80 02 4B 02 7D 71 01 86 2E

2, {}

>>> open('X.dat', 'r').read()
'\x80\x02K\x02}q\x01\x86.'