To demonstrate the problem I have written the following program:
___________________________________ Code Start
________________________________
import pickle
destruct=1
class PickleTest:
library={}
def __init__(self):
self.unpickle()
def __del__(self):
if destruct:
print "Pickling from destructor..."
self.pickle()
def unpickle(self):
try:
f=open("pickle.txt")
self.library=pickle.load(f)
f.close()
print "Unpickled just fine"
except:
print "Error unpickling"
self.library={u"A": 1,
u"B": 2,
u"C": 3}
def pickle(self):
f=open("pickle.txt","w")
pickle.dump(self.library,f)
f.close()
print "Pickled just fine"
if __name__=="__main__":
pt=PickleTest()
if not destruct:
print "Pickling from __main__..."
pt.pickle()
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________________________________
Running the program with "pickle.txt" not created and destruct=1
generates the following output:
Error unpickling
Pickling from destructor...
Exception exceptions.LookupError: 'unknown encoding: raw-unicode-
escape' in <bound method PickleTest.__del__ of <__main__.PickleTest
instance at 0xb7d3decc>> ignored
If I now change destruct to 0 the output is:
Error unpickling
Pickling from __main__...
Pickled just fine
Even more odd is that with an existing "pickle.txt" and destruct set
to 1 it seems to work correctly:
Unpickled just fine
Pickling from destructor...
Pickled just fine
I'm running Python 2.5.4 on Debian Sid.
If anybody understands the error please enlighten me.
Dan
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