Comment #4 on issue 2781 by moorepa...@gmail.com: orientnew in sympy.physics.mechanics does not support indices
http://code.google.com/p/sympy/issues/detail?id=2781
I don't think that it is too much typing and visual noise for the user to type out the indices each time a reference frame is created. It would be the easier of the two solutions to simply implement the kwargs. You don't create that many reference frames in a typical script, and if you did need to create lots of reference frames you'd probably create them with a loop and store them in a list or something. Then it is easy to supply the same indices to each reference frame.
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