I found another way to solve that problem (which seems more practical to me). You just have to redefine RealNumber and Integer:
RealNumber=float Integer=int to avoid the error. On 7 Abr, 11:45, Uri <oriol.caste...@gmail.com> wrote: > Thanks a lot, it worked!! :) > > On 7 Abr, 11:38, Robert Bradshaw <rober...@math.washington.edu> wrote: > > > On Apr 7, 2010, at 2:10 AM, Uri wrote: > > > > I'm having some problems trying to use a program calledBrian > > > Simulator (www.briansimulator.org) through Sage. This program is > > > written in Python an can be used as a python package (I've tried it > > > and I had no problem). However, when I try to use it in Sage I get > > > some problems involving units, which are defined insideBrian. For > > > example, if I write: > > > > sage: frombrianimport * > > > sage: 1*mV > > > > I get the following error: > > > > AttributeError Traceback (most recent call > > > last) > > > > /home/uri/<ipython console> in <module>() > > > > /home/uri/sage-4.3.1/local/lib/python2.6/site-packages/sage/structure/ > > > element.so in sage.structure.element.RingElement.__mul__ (sage/ > > > structure/element.c:10382)() > > > > /home/uri/sage-4.3.1/local/lib/python2.6/site-packages/sage/structure/ > > > coerce.so in sage.structure.coerce.CoercionModel_cache_maps.bin_op > > > (sage/structure/coerce.c:6145)() > > > > /home/uri/sage-4.3.1/local/lib/python2.6/site-packages/brian/units.pyc > > > in __mul__(self, other) > > > 1063 if isinstance(other,Unit): > > > 1064 u = Unit(float(self)*float(other)) > > > -> 1065 u.name = self.name + other.name > > > 1066 u.dispname = self.dispname + ' ' + other.dispname > > > 1067 u.dim = self.dim * other.dim > > > > AttributeError: name > > > > Does somebody know why it happens and how to avoid this error? What I > > > don't understand is that if I just write: > > > > sage: mV > > > > there's no problem at all. Thank you in advance!! > > > It appears thatbrian.units doesn't behave well with Sage integers > > (perhaps assuming anything that's not a float or int is a > > briansimulator unit). Try > > > sage: frombrianimport * > > sage: int(1)*mV > > > or > > > sage: 1r*mV > > > - Robert -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org To unsubscribe, reply using "remove me" as the subject.
