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Message: [QUOTE="John Machin, post: 3163541"] Impossible: (1) in "for word in words:" each word would end in "\n" and he'd have to strip those and there's no evidence of that. (2) Look at the line """afterwords = [self.words[i + 1] for i, e in enumerate(self.words) if e == word]""" and tell me how that works if self.words is a file! (3) "self.words.count(word)" -- AttributeError: 'file' object has no attribute 'count' The answer is (1) he needs to supply a file of any kind for a start [read the error messages that he got!!] (2) despite the silence of the docs, it is necessary to have opened the file in binary mode on systems where it makes a difference (notably Windows) [If the OP is still reading this thread, here's an example of how to show a problem, with minimal code that reproduces the problem, and all the output including the stack trace] C:\junk>type dpkl.py import pickle d = {'and': [1, {'to': 1}], 'down': [1, {'upon': 1}], 'them': [1, {'down': 1}], 'no': [1, {'others': 1}], 'this': [1, {'it': 1}], 'is': [2, {'a': 2}], 'upon': [1, {'a': 1}], 'it': [2, {'is': 2}], 'think': [2, {'and': 1, 'words': 1}], 'write': [1, {'this': 1}], 'to': [3, {'write': 1, 'put': 1, 'think': 1}], 'words': [1, {'no': 1}], 'others': [1, {'think': 1}], 'put': [1, {'them': 1}], 'sin': [2, {'to': 2}]} s = pickle.dumps(d, -1) dnews = pickle.loads(s) print "string", dnews == d out = open("mchain.pkl",'wb') pickle.dump(d, out, -1) out.close() f = open("mchain.pkl", "rb") dnewb = pickle.load(f) f.close() print "load binary", dnewb == d f = open("mchain.pkl", "r") dnewa = pickle.load(f) f.close() print "load text", dnewa == d C:\junk>python dpkl.py string True load binary True Traceback (most recent call last): File "dpkl.py", line 24, in <module> dnewa = pickle.load(f) File "c:\python25\lib\pickle.py", line 1370, in load return Unpickler(file).load() File "c:\python25\lib\pickle.py", line 858, in load dispatch[key](self) File "c:\python25\lib\pickle.py", line 1169, in load_binput i = ord(self.read(1)) TypeError: ord() expected a character, but string of length 0 found Changing the first line to import cPickle as pickle gives this: C:\junk>python dpkl.py string True load binary True Traceback (most recent call last): File "dpkl.py", line 24, in <module> dnewa = pickle.load(f) EOFError Each of the two different errors indicate that reading was terminated prematurely by the presence of the good ol' ^Z aka CPMEOF in the file: 363 HTH, John [/QUOTE]

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