Something is still not quite right though, look at this for example: In [1]: from sympy import Matrix, symbols, __version__
In [2]: from numpy import array, load In [3]: __version__ Out[3]: '0.6.3' In [4]: m = array(Matrix([1,2,3])).astype('d') In [5]: m Out[5]: array([[ 1.], [ 2.], [ 3.]]) In [6]: m.dump('spam.dat') In [7]: M = load('spam.dat') # no problems here In [8]: M Out[8]: array([[ 1.], [ 2.], [ 3.]]) In [9]: m = array(Matrix([1,2,3])).astype('object') In [10]: m.dump('spam.dat') In [11]: M = load('spam.dat') # problem here --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/williamh/<ipython console> in <module>() /usr/lib/python2.5/site-packages/numpy/core/numeric.pyc in load(file) 609 if isinstance(file, type("")): 610 file = _file(file,"rb") --> 611 return _cload(file) 612 613 # Adapted from matplotlib TypeError: __new__() takes exactly 2 arguments (1 given) Looks like the problem arises when the numpy array contains 'objects', right? However, if I construct a 'clean' NumPy array containing 'objects', I get different behaviour: In [16]: m = array([1,2,3]).astype('object') # no sympy Matrix here In [17]: m.dump('spam.dat') In [18]: M = load('spam.dat') # and no problem here In [20]: numpy.__version__ Out[20]: '1.0.4' Something probably (obviously?) goes astray during the conversion from sympy.Matrix -> numpy.array. Perhaps a symbol to string conversion? Dunno. Regards, William 2008/11/25 Ondrej Certik <[EMAIL PROTECTED]>: > > On Tue, Nov 25, 2008 at 11:32 AM, William Hunter <[EMAIL PROTECTED]> wrote: >> >> Hmmm, I was too hasty, this doesn't happen under 0.6.3 (which I >> thought I had). > > No problem. Btw, if you know how to solve the pickling problem with > protocol 2, it'd be really cool. I have no idea so far: > > http://code.google.com/p/sympy/issues/detail?id=1177 > > Thanks, > Ondrej > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---