1 files changed, 50 insertions, 0 deletions
diff --git a/intern/python/modules/mcf/utils/typeclasses.py b/intern/python/modules/mcf/utils/typeclasses.py
new file mode 100644
index 00000000000..ed798dfe3da
--- /dev/null
+++ b/intern/python/modules/mcf/utils/typeclasses.py
@@ -0,0 +1,50 @@
+'''
+Classes of Types
+
+Often you want to be able to say:
+	if type(obj) in MutableTypes:
+		yada
+		
+This module is intended to make that easier.
+Just import and use :)
+'''
+import types
+
+MutableTypes = [ types.ListType, types.DictType, types.InstanceType ]
+MutableSequenceTypes = [ types.ListType ]
+SequenceTypes = [ types.ListType, types.StringType, types.TupleType ]
+NumericTypes = [ types.IntType, types.FloatType, types.LongType, types.ComplexType ]
+MappingTypes = [ types.DictType ]
+
+def regarray():
+	if globals().has_key('array'):
+		return 1
+	try:
+		import array
+		SequenceTypes.append( array.ArrayType )
+		MutableTypes.append( array.ArrayType )
+		MutableSequenceTypes.append( array.ArrayType )
+		return 1
+	except ImportError:
+		return 0
+
+def regnumpy():
+	'''
+	Call if you want to register numpy arrays
+	according to their types.
+	'''
+	if globals().has_key('Numeric'):
+		return 1
+	try:
+		import Numeric
+		SequenceTypes.append( Numeric.ArrayType )
+		MutableTypes.append( Numeric.ArrayType )
+		MutableSequenceTypes.append( Numeric.ArrayType )
+		return 1
+	except ImportError:
+		return 0
+
+# for now, I'm going to always register these, if the module becomes part of the base distribution
+# it might be better to leave it out so numpy isn't always getting loaded...
+regarray()
+regnumpy()
+\ No newline at end of file