#5909: symbolics -- x.subs_expr({}) hangs sage
-----------------------+----------------------------------------------------
Reporter: mabshoff | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.2
Component: symbolics | Keywords:
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This might have been fixed by the pynac switch, but we will see:
{{{
----------------------------------------------------------------------
| Sage Version 3.4.2.alpha0, Release Date: 2009-04-24 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage:
sage: x.subs_expr({x:1})
1
sage: x.subs_expr({})
Control-C pressed. Interrupting Maxima. Please wait a few seconds...
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/mabshoff/.sage/temp/sage.math.washington.edu/10619/_home_mabshoff__sage_init_sage_0.py
in <module>()
/scratch/mabshoff/sage-3.4.2.rc0/local/lib/python2.5/site-
packages/sage/calculus/calculus.pyc in subs_expr(self, *equations)
4579 v = ','.join(['%s=%s'%(x.lhs()._maxima_init_(),
x.rhs()._maxima_init_()) \
4580 for x in equations])
-> 4581 return R(self._maxima_().subst(v))
4582
4583
###################################################################
/scratch/mabshoff/sage-3.4.2.rc0/local/lib/python2.5/site-
packages/sage/interfaces/maxima.pyc in subst(self, val)
2096 342
2097 """
-> 2098 return self.comma(val)
2099
2100 def comma(self, args):
/scratch/mabshoff/sage-3.4.2.rc0/local/lib/python2.5/site-
packages/sage/interfaces/maxima.pyc in comma(self, args)
2111 self._check_valid()
2112 P = self.parent()
-> 2113 return P('%s, %s'%(self.name(), args))
2114
2115 def _latex_(self):
/scratch/mabshoff/sage-3.4.2.rc0/local/lib/python2.5/site-
packages/sage/interfaces/expect.pyc in __call__(self, x, name)
1021
1022 if isinstance(x, basestring):
-> 1023 return cls(self, x, name=name)
1024 try:
1025 return self._coerce_from_special_method(x)
/scratch/mabshoff/sage-3.4.2.rc0/local/lib/python2.5/site-
packages/sage/interfaces/expect.pyc in __init__(self, parent, value,
is_name, name)
1396 except (TypeError, KeyboardInterrupt, RuntimeError,
ValueError), x:
1397 self._session_number = -1
-> 1398 raise TypeError, x
1399 self._session_number = parent._session_number
1400
TypeError:
sage:
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5909>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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