Hello,
I just hit some strange interaction between Weyl groups, interactive
Gap session and deepcopy.
Anyone help on debugging this?
Thanks in advance,
Nicolas
----------------------------------------------------------------------
| Sage Version 3.4, Release Date: 2009-03-11 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: W = WeylGroup(["A",2])
sage: from copy import deepcopy
sage: W.list()
[[0 0 1]
[0 1 0]
[1 0 0],
[0 0 1]
[1 0 0]
[0 1 0],
[0 1 0]
[0 0 1]
[1 0 0],
[0 1 0]
[1 0 0]
[0 0 1],
[1 0 0]
[0 0 1]
[0 1 0],
[1 0 0]
[0 1 0]
[0 0 1]]
sage: deepcopy(QQ)
Rational Field
sage: deepcopy(QQ)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/nthiery/.sage/temp/zephyr/6426/_home_nthiery__sage_init_sage_0.py in
<module>()
/opt/sage/local/lib/python/copy.pyc in deepcopy(x, memo, _nil)
187 raise Error(
188 "un(deep)copyable object of type %s" %
cls)
--> 189 y = _reconstruct(x, rv, 1, memo)
190
191 memo[d] = y
/opt/sage/local/lib/python/copy.pyc in _reconstruct(x, info, deep, memo)
335 if state:
336 if deep:
--> 337 state = deepcopy(state, memo)
338 if hasattr(y, '__setstate__'):
339 y.__setstate__(state)
/opt/sage/local/lib/python/copy.pyc in deepcopy(x, memo, _nil)
160 copier = _deepcopy_dispatch.get(cls)
161 if copier:
--> 162 y = copier(x, memo)
163 else:
164 try:
/opt/sage/local/lib/python/copy.pyc in _deepcopy_dict(x, memo)
252 memo[id(x)] = y
253 for key, value in x.iteritems():
--> 254 y[deepcopy(key, memo)] = deepcopy(value, memo)
255 return y
256 d[dict] = _deepcopy_dict
/opt/sage/local/lib/python/copy.pyc in deepcopy(x, memo, _nil)
160 copier = _deepcopy_dispatch.get(cls)
161 if copier:
--> 162 y = copier(x, memo)
163 else:
164 try:
/opt/sage/local/lib/python/copy.pyc in _deepcopy_dict(x, memo)
252 memo[id(x)] = y
253 for key, value in x.iteritems():
--> 254 y[deepcopy(key, memo)] = deepcopy(value, memo)
255 return y
256 d[dict] = _deepcopy_dict
/opt/sage/local/lib/python/copy.pyc in deepcopy(x, memo, _nil)
169 y = _deepcopy_atomic(x, memo)
170 else:
--> 171 copier = getattr(x, "__deepcopy__", None)
172 if copier:
173 y = copier(memo)
/opt/sage/local/lib/python2.5/site-packages/sage/interfaces/expect.pyc in
__getattr__(self, attrname)
1516
1517 def __getattr__(self, attrname):
-> 1518 P = self._check_valid()
1519 if attrname[:1] == "_":
1520 raise AttributeError
/opt/sage/local/lib/python2.5/site-packages/sage/interfaces/expect.pyc in
_check_valid(self)
1471 raise ValueError, "The %s session in which this object
was defined is no longer running."%P.name()
1472 except AttributeError:
-> 1473 raise ValueError, "The session in which this object was
defined is no longer running."
1474 return P
1475
ValueError: The session in which this object was defined is no longer running.
> /opt/sage-3.4.rc0/local/lib/python2.5/site-packages/sage/interfaces/expect.py(1473)_check_valid()
1472 except AttributeError:
-> 1473 raise ValueError, "The session in which this object was
defined is no longer running."
1474 return P
ipdb>
Nicolas
--
Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>
http://Nicolas.Thiery.name/
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