From a60e10c3de81ed815ef66dc22851fbe2de9ee5e8 Mon Sep 17 00:00:00 2001
From: Ray Speth <speth@mit.edu>
Date: Fri, 1 Feb 2013 23:39:40 +0000
Subject: [PATCH] [Cython] Allow creation of Mixture objects without quantities
 for each phase

---
 interfaces/cython/cantera/mixture.pyx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/interfaces/cython/cantera/mixture.pyx b/interfaces/cython/cantera/mixture.pyx
index 29383bd1e..460c0c26e 100644
--- a/interfaces/cython/cantera/mixture.pyx
+++ b/interfaces/cython/cantera/mixture.pyx
@@ -36,6 +36,10 @@ cdef class Mixture:
         self._phases = []
 
         cdef _SolutionBase phase
+        if isinstance(phases[0], _SolutionBase):
+            # Assign default composition to the list of phases
+            phases = [(p, 1 if i == 0 else 0) for i,p in enumerate(phases)]
+
         for phase,moles in phases:
             self.mix.addPhase(phase.thermo, moles)
             self._phases.append(phase)