tevt.py : Loads a single event

Expected output below shows the dimensions of the constitent numpy arrays that comprise the event:

Evt(-4,"torch","PmtInBox","PmtInBox/torch/-4 : ", seqs="[]")
 fdom :            (3, 1, 4) : (metadata) 3*float4 domains of position, time, wavelength (used for compression)
 idom :            (1, 1, 4) : (metadata) int domain
   ox :       (100000, 4, 4) : (photons) final photon step
   wl :            (100000,) : (photons) wavelength
 post :          (100000, 4) : (photons) final photon step: position, time
 dirw :          (100000, 4) : (photons) final photon step: direction, weight
 polw :          (100000, 4) : (photons) final photon step: polarization, wavelength
flags :            (100000,) : (photons) final photon step: flags
   c4 :            (100000,) : (photons) final photon step: dtype split uint8 view of ox flags
rx_raw :   (100000, 10, 2, 4) : (records) photon step records RAW:before reshaping
   rx :   (100000, 10, 2, 4) : (records) photon step records
   ph :       (100000, 1, 2) : (records) photon history flag/material sequence
   ps :       (100000, 1, 4) : (photons) phosel sequence frequency index lookups (uniques 30)
   rs :   (100000, 10, 1, 4) : (records) RAW recsel sequence frequency index lookups (uniques 30)
  rsr :   (100000, 10, 1, 4) : (records) RESHAPED recsel sequence frequency index lookups (uniques 30)