Issue 1176: pickle bug in protocol 2
http://code.google.com/p/sympy/issues/detail?id=1176
New issue report by ondrej.certik:
In [1]: import pickle
In [2]: pickle.loads(pickle.dumps(sin(4)))
Out[2]: sin(4)
In [3]: pickle.loads(pickle.dumps(sin(4), 2))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (172, 0))
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/ondra/repos/sympy/<ipython console> in <module>()
/usr/lib/python2.5/pickle.pyc in loads(str)
1372 def loads(str):
1373 file = StringIO(str)
-> 1374 return Unpickler(file).load()
1375
1376 # Doctest
/usr/lib/python2.5/pickle.pyc in load(self)
856 while 1:
857 key = read(1)
--> 858 dispatch[key](self)
859 except _Stop, stopinst:
860 return stopinst.value
/usr/lib/python2.5/pickle.pyc in load_newobj(self)
1081 args = self.stack.pop()
1082 cls = self.stack[-1]
-> 1083 obj = cls.__new__(cls, *args)
1084 self.stack[-1] = obj
1085 dispatch[NEWOBJ] = load_newobj
/home/ondra/repos/sympy/sympy/core/multidimensional.pyc in wrapper(*args,
**kwargs)
125 result = apply_on_element(wrapper, args,
kwargs, n)
126 return result
--> 127 return f(*args, **kwargs)
128 wrapper.__doc__ = f.__doc__
129 wrapper.__name__ = f.__name__
/home/ondra/repos/sympy/sympy/core/cache.pyc in wrapper(*args, **kw_args)
83 except KeyError:
84 pass
---> 85 func_cache_it_cache[k] = r = func(*args, **kw_args)
86 return r
87
/home/ondra/repos/sympy/sympy/core/function.pyc in __new__(cls, *args,
**options)
131 if options.get('evaluate') is False:
132 return Basic.__new__(cls, *args, **options)
--> 133 r = cls.canonize(*args)
134 if isinstance(r, Basic):
135 return r
TypeError: canonize() takes exactly 2 arguments (1 given)
This prevents sympy to be working with ipython parallel stuff, so it needs
to be fixed. It also looks like a python bug, since if it works with
protocol 1, it should work with protocol 2 as well.
Issue attributes:
Status: Accepted
Owner: ----
Labels: Type-Defect Priority-High
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