<copied from issue 2059>
Just a follow up about using subs(wild=True). If Idx is derived from
Expr rather than Basic, then the wild subs shown below (in t2) works:
>>> eq=A*M(i, j)**n + B*M(1 + i, j)**(1 + n)- D*M(i, j)**(1 + n)
>>> Eq(*reversed(collect(eq.subs(w**(1+n), w**(1+n)*u, wild=True),
>>> u).as_independent( u))).subs(u, 1) B*M(1 + i, j)**(1 + n) - D*M(i, j)**(1 +
>>> n) == A*M(i, j)**n
>>>
I still think the lambda for collection, as_independent (and
coefficient, atoms, has, subs, etc...) would be useful. Also,
something that would be nice in the wild=True subs would be if there
was a way to refer (as in a grep pattern) to the thing that was found.
What could be used for that -- the no-name Dummy as in C.Dummy(''):
>>> C.Dummy('')
_
>>> _.name
''
--
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.
