Add a few other minor py3k test fixes.

1) Change unicode string unicode string check in TestTemplates.py.
2) Eliminate some obsolete imports (like "exceptions").
3) Convert string to bytes in TestDataEncoder.py.

Common/DataModel/Testing/Python/TestTemplates.py

@@ -29,6 +29,12 @@ arrayCodes = ['c', 'b', 'B', 'h', 'H',
               'i', 'I', 'l', 'L', 'q', 'Q',
               'f', 'd']
 
+# create a unicode string for python 2 and python 3
+if sys.hexversion >= 0x03000000:
+    francois = 'Fran\xe7ois'
+else:
+    francois = unicode('Fran\xe7ois', 'latin1')
+
 class TestTemplates(Testing.vtkTest):
 
     def testDenseArray(self):
@@ -52,8 +58,13 @@ class TestTemplates(Testing.vtkTest):
                 a.SetValue(i, value)
                 result = a.GetValue(i)
                 self.assertEqual(value, result)
-            elif t in [str, 'str', 'unicode']:
-                value = u"hello"
+            elif t in [str, 'str']:
+                value = "hello"
+                a.SetValue(i, value)
+                result = a.GetValue(i)
+                self.assertEqual(value, result)
+            elif t in ['unicode']:
+                value = francois
                 a.SetValue(i, value)
                 result = a.GetValue(i)
                 self.assertEqual(value, result)
@@ -89,8 +100,13 @@ class TestTemplates(Testing.vtkTest):
                 a.SetValue(i, value)
                 result = a.GetValue(i)
                 self.assertEqual(value, result)
-            elif t in [str, 'str', 'unicode']:
-                value = u"hello"
+            elif t in [str, 'str']:
+                value = "hello"
+                a.SetValue(i, value)
+                result = a.GetValue(i)
+                self.assertEqual(value, result)
+            elif t in ['unicode']:
+                value = francois
                 a.SetValue(i, value)
                 result = a.GetValue(i)
                 self.assertEqual(value, result)

Filters/Geometry/Testing/Python/TestGhostPoints.py

 import sys
-try:
-    # for Python2
-    import exceptions
-except ImportError:
-    # In Python 3 standard exceptions were moved to builtin module.
-    pass
 import vtk
 from vtk.test import Testing
 

Testing/Core/HeaderTesting.py

@@ -32,7 +32,6 @@ import sys
 import re
 import os
 import stat
-import string
 
 # Get the path to the directory containing this script.
 if __name__ == '__main__':
@@ -115,11 +114,15 @@ class TestVTKFiles:
         self.ClassName = ""
         self.ParentName = ""
         try:
-            file = open(filename)
+            if sys.hexversion >= 0x03000000:
+                file = open(filename, encoding='ascii', errors='ignore')
+            else:
+                file = open(filename)
             self.FileLines = file.readlines()
             file.close()
         except:
-            self.Print( "Problem reading file: %s" % filename )
+            self.Print("Problem reading file %s:\n%s" %
+                       (filename, str(sys.exc_info()[1])))
             sys.exit(1)
         return not self.CheckExclude()
 

Web/Core/Testing/Python/TestDataEncoder.py

 import sys
-try:
-    # for Python2
-    import exceptions
-except ImportError:
-    # for Python3
-    pass
 import vtk
 import array
 from vtk.test import Testing
@@ -43,7 +37,7 @@ class TestDataEncoder(Testing.vtkTest):
 
         # Use vtkDataEncoder to convert the image to PNG format and Base64 encode it
         encoder = vtk.vtkDataEncoder()
-        base64String = encoder.EncodeAsBase64Png(imgData)
+        base64String = encoder.EncodeAsBase64Png(imgData).encode('ascii')
 
         # Now Base64 decode the string back to PNG image data bytes
         outputBuffer = bytearray(120000)