Series around Inf produces series around -Inf

[rakhusur]

Hi, I'm getting the following behaviour:

julia> using SymPy

julia> @syms k
(k,)

julia> series(atan(k), x=k, x0=Inf)
   1      1     1   π    ⎛1         ⎞
- ──── + ──── - ─ - ─ + O⎜──; k → -∞⎟
     5      3   k   2    ⎜ 6        ⎟
  5⋅k    3⋅k             ⎝k         ⎠

With x0=-Inf, I get the same (this time correct) result. Running the same in python works fine.

[jverzani]

Sorry, I somehow missed this. A simple workaround is to use oo, not the floating point Inf. For some reason, that conversion isn't happening appropriately and I can't tell why not, as both sympify(Inf) and Sym(Inf) work as expected.