From 78c9c9c0a5997183946cbdb97dcf614a6585e4ac Mon Sep 17 00:00:00 2001
From: Ray Speth <speth@mit.edu>
Date: Fri, 20 Jun 2014 19:41:14 +0000
Subject: [PATCH] [CTI] Allow omitting third body in Chebyshev reaction
 equations

Cherry-pick of trunk r2930.
---
 interfaces/python/ctml_writer.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/interfaces/python/ctml_writer.py b/interfaces/python/ctml_writer.py
index d7e3adef7..8ede37bf5 100644
--- a/interfaces/python/ctml_writer.py
+++ b/interfaces/python/ctml_writer.py
@@ -1475,8 +1475,9 @@ class chebyshev_reaction(reaction):
         self.coeffs = coeffs
 
         # clean up reactant and product lists
-        del self._r['(+']
-        del self._p['(+']
+        if '(+' in self._r:
+            del self._r['(+']
+            del self._p['(+']
         if 'M)' in self._r:
             del self._r['M)']
             del self._p['M)']