Here are two Python versions - one for Windows and one for Mac…
(unfortunately, rs.GetBoolean() is not yet implemented in the Mac version of Python rhinoscriptsyntax yet, hence the second version for Mac.)
I also made one more change the the vb version, so I will post it here also…
At some point I will re-write the python version using RhinoCommon to avoid calling rs.Command for the unroll, but I’m being lazy right now. 
–Mitch
MultiUnroll.rvb (3.0 KB)
MultiUnroll.py (2.8 KB)
MultiUnrollMac.py (2.9 KB)