gluex.hddm-r 2.1.13

methods for reading and writing GlueX reconstructed event data

gluex.hddm_r - i/o library for reading and writing reconstructed events from the GlueX detector

The gluex.hddm_r module is a python wrapper around the c++ library that implements reading and writing of reconstructed events from the GlueX detector, based on the HDDM event i/o framework. Every hddm_r file consists of a plain-text header describing the structure of the event data contained in the file in xml format known as a hddm template. After the header follows compressed binary data describing the sequence of reconstructed events contained in the file. All files with valid hddm_r events share a compatible template indicated by the class="s" attribute in the first line of the file header. All such files should be readable by this module if they are compliant with the HDDM standard. For more details on the standard, see https://github.com/rjones30/HDDM.

For details on the hddm_r API, install gluex.hddm_r and type "pydoc gluex.hddm_r". Here is a quickstart example of an analysis tool that reads from hddm_r input files.

from gluex import hddm_r
for rec in hddm_r.istream("http://nod25.phys.uconn.edu:2880/Gluex/simulation" +
                          "/simsamples/particle_gun-v5.2.0/particle_gun001_019_rest.hddm"):
   for pe in rec.getPhysicsEvents():
      print(f"http streaming reader found run {pe.runNo}, event {pe.eventNo}")

for rec in hddm_r.istream("https://nod25.phys.uconn.edu:2843/Gluex/simulation" +
                          "/simsamples/particle_gun-v5.2.0/particle_gun001_019_rest.hddm"):
   for pe in rec.getPhysicsEvents():
      print(f"https streaming reader found run {pe.runNo}, event {pe.eventNo}")

for rec in hddm_r.istream("root://nod25.phys.uconn.edu/Gluex/simulation" +
                          "/simsamples/particle_gun-v5.2.0/particle_gun001_019_rest.hddm"):
   for pe in rec.getPhysicsEvents():
      print(f"xrootd streaming reader run {pe.runNo}, event {pe.eventNo}")