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.
Ondrej
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