A python shell behave exactly as the ipython shell did. In both case MV.setup(basis,metric) is a string rather than an object with lots of attributes.
I was trying to use GA to run some text book inner outer and geometric product while I was reading. Thanks for the help. Scott In [25]: g=MV.setup(basis,metric) In [26]: type g -------> type(g) Out[26]: <type 'str'> In [27]: g Out[27]: 'Setup of a0 a1 a2 n nbar complete!' On Jun 30, 5:19 pm, Alan Bromborsky <abro...@verizon.net> wrote: > Alan Bromborsky wrote: > > Scott wrote: > >> Does the geometric algebra module work interactively? > > >> When I run the following code in an ipython shell it seem to not like > >> the basis format. > > >> I can run the demo scripts form > >>http://docs.sympy.org/modules/galgebra/GA/GAsympy.html > >> with latex output with no trouble. > > >> Cheers, > > >> Scott > > >> from sympy.galgebra.GA import * > >> basis = 'a0 a1 a2 n nbar' > >> metric = '# # # 0 0, # # # 0 0, # # # 0 0, 0 0 0 0 2, 0 0 0 2 0' > >> g=MV.setup(basis,metric) > > >> AttributeError Traceback (most recent call > >> last) > > >> /home/cb/<ipython console> in <module>() > > >> /usr/lib/pymodules/python2.6/sympy/galgebra/GA.pyc in setup(basis, > >> metric, rframe, coords, debug, offset) > >> 831 for coord in coords: > >> 832 basislst.append(MV.basisroot > >> +'_'+str(coord)) > >> --> 833 MV.define_basis(basislst) > >> 834 if type(metric) == types.StringType: > >> 835 MV.metric_str = True > > >> /usr/lib/pymodules/python2.6/sympy/galgebra/GA.pyc in > >> define_basis(basis) > >> 423 """ > >> 424 MV.vbasis = basis > >> --> 425 MV.vsyms = make_symbols(MV.vbasis) > >> 426 MV.n = len(MV.vbasis) > >> 427 MV.nrg = range(MV.n) > > >> /usr/lib/pymodules/python2.6/sympy/galgebra/GA.pyc in > >> make_symbols(symnamelst) > >> 204 tmp = sympy.Symbol(name) > >> 205 sym_lst.append(tmp) > >> --> 206 setattr(MAIN_PROGRAM,name,tmp) > >> 207 isym += 1 > >> 208 return(sym_lst) > > >> AttributeError: 'str' object has no attribute 'a0' > > > Try the following: > > > In [1]: import sys > > > In [2]: from sympy.galgebra.GA import * > > > In [3]: set_main(sys.modules[__name__]) > > > In [4]: basis = 'a0 a1 a2 n nbar' > > > In [5]: metric = '# # # 0 0, # # # 0 0, # # # 0 0, 0 0 0 0 2, 0 0 0 2 0' > > > In [6]: g=MV.setup(basis,metric) > > > In [7]: > > My code does not generate an error with g=MV.setup(basis,metric), but > neither does it broadcast the basis vectors to the main program. I > don't know the ins and outs of ipython versus python well enough (or at > all) to know why it doesn't work. My normal mode of operation is to use > geany as a development environment so that editing the code and > executing is easy. I never worried about interactive operation. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
