[Cython] Added access to the "id" property of ThermoPhase objects

interfaces/cython/cantera/_cantera.pxd

@@ -47,6 +47,8 @@ cdef extern from "cantera/thermo/ThermoPhase.h" namespace "Cantera":
         string report(cbool) except +
         string name()
         void setName(string)
+        string id()
+        void setID(string)
         double minTemp() except +
         double maxTemp() except +
         double refPressure() except +

interfaces/cython/cantera/test/test_thermo.py

@@ -64,6 +64,13 @@ class TestThermoPhase(utilities.CanteraTest):
         self.assertEqual(self.phase.name, 'something')
         self.assertTrue('something' in self.phase.report())
 
+    def test_ID(self):
+        self.assertEqual(self.phase.ID, 'ohmech')
+
+        self.phase.ID = 'something'
+        self.assertEqual(self.phase.ID, 'something')
+        self.assertEqual(self.phase.name, 'ohmech')
+
     def test_badLength(self):
         X = np.zeros(5)
         def set_X():

interfaces/cython/cantera/thermo.pyx

@@ -43,6 +43,16 @@ cdef class ThermoPhase(_SolutionBase):
         def __set__(self, name):
             self.thermo.setName(stringify(name))
 
+    property ID:
+        """
+        The ID of the phase. The default is taken from the CTI/XML input file.
+        """
+        def __get__(self):
+            return pystr(self.thermo.id())
+        def __set__(self, id_):
+            self.thermo.setID(stringify(id_))
+
+
     property basis:
         """
         Determines whether intensive thermodynamic properties are treated on a