Can no longer install numba with python 2 about sirf-exercises HOT 5 CLOSED

I think numba is a leftover from some performance hacks @rijobro was trying - looks like it can be removed.

from sirf-exercises.

yeah, it looks like it wasn't actually being used in the notebook. It is, however, used in a few others (but not pip installed):

• https://github.com/SyneRBI/SIRF-Exercises/blob/master/notebooks/Synergistic/de_Pierro_MAPEM.ipynb
• https://github.com/SyneRBI/SIRF-Exercises/blob/master/notebooks/Synergistic/Solutions/Dual_PET_Answer-noMotion.ipynb
• https://github.com/SyneRBI/SIRF-Exercises/blob/master/notebooks/Synergistic/Solutions/Dual_PET_Answer-wMotion.ipynb

from sirf-exercises.

Serves us right from not upgrading to Python 3. @paskino, this will have to be a priority after 2.2 (unless it's a matter of dropping in ubuntu 20.04, but that seems unlikely!)

I suggest to move the import numba to a new cell, but commented out, saying that they can uncomment it and subsequent @jit lines if they have python3 (and numba).

from sirf-exercises.

How much of a speedup does it really give in those notebooks? May just be better to leave it out...

from sirf-exercises.

Comment from a notebook says

Using jit gets computation time from 90 secs to 2!

So I'm inclined to comment it out rather than delete.

from sirf-exercises.