Added properties to return a collection of mirrors, beam splitters and spaces...

Added properties to return a collection of mirrors, beam splitters and spaces as part of a kat object

pykat/finesse.py

@@ -81,7 +81,7 @@ from collections import namedtuple, OrderedDict
 
 from pykat.node_network import NodeNetwork
 from pykat.detectors import BaseDetector as Detector
-from pykat.components import Component
+from pykat.components import Component, mirror, beamSplitter, space
 from pykat.commands import Command, xaxis
 from pykat.SIfloat import *
 from pykat.param import Param, AttrParam
@@ -809,6 +809,21 @@ class kat(object):
 
         return tuple(items)
     
+    @property
+    def mirrors(self):
+        """Returns a collection of the mirrors defined within the kat object."""
+        return self.getAll(mirror)
+
+    @property
+    def beamSplitters(self):
+        """Returns a collection of the beam splitters defined within the kat object."""
+        return self.getAll(beamSplitter)
+
+    @property
+    def spaces(self):
+        """Returns a collection of the spaces defined within the kat object."""
+        return self.getAll(space)
+        
     def __deepcopy__(self, memo):
         """
         When deep copying a kat object we need to take into account