On Dec 10, 2007 2:06 PM, Ondrej Certik <[EMAIL PROTECTED]> wrote:
>
> On Dec 10, 2007 2:01 PM, julius <[EMAIL PROTECTED]> wrote:
> >
> > Hi All!
> >
> > I got a strange error which looks to me more like a problem of python
> > itself than of sympy. Before i report it i first want to post it
> > anyhow here, just in case somebody has seen it already (still i could
> > not found it in the discussions..). I also could not find it among to
> > python bugs, but I have no experience there.
> >
> > It is an 'SystemError', which comes up when trying to match. I am
> > wiórking on XP propfessional, here is the session; i found is
> > yesterday on 0.5.7, also upgrading to 0.5.8 did not change anything; i
> > leave also my typos in there..:
> > ----------------------------------------------------------------------------------------------------------------------
> > Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> > (Intel)] on win32
> > Type "copyright", "credits" or "license()" for more information.
> >
> > ****************************************************************
> > Personal firewall software may warn about the connection IDLE
> > makes to its subprocess using this computer's internal loopback
> > interface. This connection is not visible on any external
> > interface and no data is sent to or received from the Internet.
> > ****************************************************************
> >
> > IDLE 1.2
> > >>> from sympy import *
> > >>> sympy
> >
> > Traceback (most recent call last):
> > File "<pyshell#1>", line 1, in <module>
> > sympy
> > NameError: name 'sympy' is not defined
> > >>> x,y =symbols('xy')
> > >>> p=Wild('p')
> > >>> q=Wild('q')
> > >>> w=WildFunction('w',nofargs='1')
> > >>>
> > KeyboardInterrupt
> > >>> ex=x**3*sin(y)
> > >>> ex.match(p**q*w)
> >
> > Traceback (most recent call last):
> > File "<pyshell#7>", line 1, in <module>
> > ex.match(p**q*w)
> > SystemError: NULL result without error in PyObject_Call
> > >>> help(SystemError)
> > Help on class SystemError in module exceptions:
> >
> > class SystemError(StandardError)
> > | Internal error in the Python interpreter.
> > |
> > | Please report this to the Python maintainer, along with the
> > traceback,
> > | the Python version, and the hardware/OS platform and version.
> > |
> >
>
> Thanks very much for reporting this bug. This is what I get on Debian:
>
> [EMAIL PROTECTED]:~/sympy$ python
> Python 2.4.4 (#2, Aug 16 2007, 02:03:40)
> [GCC 4.1.3 20070812 (prerelease) (Debian 4.1.2-15)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from sympy import *
> >>> x, y = symbols("xy")
> >>> p = Wild("p")
> >>> q = Wild("q")
> >>> w=WildFunction('w',nofargs='1')
> >>>
> >>> ex=x**3*sin(y)
> >>> ex.match(p**q*w)
> {Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> File "sympy/core/basic_methods.py", line 335, in __repr__
> return self.tostr()
> File "sympy/core/function.py", line 377, in tostr
> return self.name + '_'
> File "sympy/core/basic_methods.py", line 267, in __getattr__
> raise AttributeError("'%s' object has no attribute '%s'"%
> AttributeError: 'WildFunction' object has no attribute 'name'
>
> So clearly there is a bug in sympy, I'll try to fix it in the evening.
> As to your SystemError, that I think is a bug in Python.
I created an issue for that:
http://code.google.com/p/sympy/issues/detail?id=487
you can watch progress on this problem. It works in isympy for me, but
it doesn't work in python. That's weird.
Ondrej
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