Comment #1 on issue 3569 by aaaagra...@gmail.com: ReferenceFrame is not
pickable
http://code.google.com/p/sympy/issues/detail?id=3569
Currently, instantiating ReferenceFrame returns RuntimeError
from sympy.physics.mechanics import *
N = ReferenceFrame('N')
Exception in SymPy Live of type
<type 'exceptions.RuntimeError'>
for reference the last 5 stack trace entries are
Traceback (most recent call last):
File "/base/data/home/apps/s~sympy-live-hrd/34.366402816395225014/shell.py",
line 760, in post
live.evaluate(statement, session, printer, stream)
File "/base/data/home/apps/s~sympy-live-hrd/34.366402816395225014/shell.py",
line 442, in evaluate
session.set_global(name, val)
File "/base/data/home/apps/s~sympy-live-hrd/34.366402816395225014/shell.py",
line 507, in set_global
blob = db.Blob(self.fast_dumps(value, 1))
File "/base/data/home/apps/s~sympy-live-hrd/34.366402816395225014/shell.py",
line 573, in fast_dumps
p.dump(obj)
File "/base/python_runtime/python_dist/lib/python2.5/pickle.py", line
218, in dump
self.save(obj)
RuntimeError: maximum recursion depth exceeded
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