diff --git a/src/diffpy/pdfgui/gui/wxextensions/validators.py b/src/diffpy/pdfgui/gui/wxextensions/validators.py
index 5a09ffff..07dc061f 100644
--- a/src/diffpy/pdfgui/gui/wxextensions/validators.py
+++ b/src/diffpy/pdfgui/gui/wxextensions/validators.py
@@ -1,4 +1,9 @@
 #!/usr/bin/env python
+
+import string
+
+import wx
+
 ##############################################################################
 #
 # wxextensions      by DANSE Diffraction group
@@ -23,10 +28,6 @@
 DIGIT_ONLY = 2
 FLOAT_ONLY = 3
 
-import string
-
-import wx
-
 
 class TextValidator(wx.Validator):
     """This validator is designed to check text input for wxTextCtrls. (It might