From 25eb7edffdc66d7e2ec3ed21a86832513aee8ead Mon Sep 17 00:00:00 2001
From: John Tramm <john.tramm@gmail.com>
Date: Mon, 2 Dec 2019 19:54:10 +0000
Subject: [PATCH] update Bank datatype on python side

---
 examples/xml/pincell/settings.xml | 2 +-
 openmc/lib/core.py                | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/examples/xml/pincell/settings.xml b/examples/xml/pincell/settings.xml
index d9fab5b63..7b0a985f1 100644
--- a/examples/xml/pincell/settings.xml
+++ b/examples/xml/pincell/settings.xml
@@ -5,7 +5,7 @@
   <run_mode>eigenvalue</run_mode>
   <batches>10</batches>
   <inactive>5</inactive>
-  <particles>100000</particles>
+  <particles>1000</particles>
 
   <!-- The starting source is a uniform distribution over the entire pin
        cell. Note that since this is effectively a 2D model, the z coordinates
diff --git a/openmc/lib/core.py b/openmc/lib/core.py
index 0bfdb457b..f26ddc525 100644
--- a/openmc/lib/core.py
+++ b/openmc/lib/core.py
@@ -20,7 +20,8 @@ class _Bank(Structure):
                 ('E', c_double),
                 ('wgt', c_double),
                 ('delayed_group', c_int),
-                ('particle', c_int)]
+                ('particle', c_int),
+                ('parent_id', c_int64)]
 
 
 # Define input type for numpy arrays that will be passed into C++ functions