Maybe you could look at how Indexed does it, in
sympy/tensors/indexed.py, as it is (unfortunately, see
http://code.google.com/p/sympy/issues/detail?id=2659) always
non-commutative. Hopefully the way that it does it is correct and I'm
not just misleading you (but it does work anyway).
Aaron Meurer
On Fri, Mar 9, 2012 at 3:13 PM, Alan Bromborsky <abro...@verizon.net> wrote:
> I have a class Vector where:
>
> class Vector(Symbol):
>
> def __init__(self,basis_str=None):
> if isinstance(basis_str,Vector):
> self = basis_str
> else:
> if basis_str == None or basis_str == '0':
> self = S(0)
> else:
> Symbol.__init__(self,basis_str,commutative=False)
> print self
> print self.is_commutative
>
> then:
>
> er = Vector('er')
>
> outputs my diagnostic print -
>
> er
> True
>
> How do I subclass and get self.is_commutative = False?
>
> --
> 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
> sympy+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/sympy?hl=en.
>
--
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
sympy+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/sympy?hl=en.
