Arch: survey: py3-fix

src/Mod/Arch/ArchCommands.py

@@ -1076,7 +1076,11 @@ class SurveyTaskPanel:
         if rows:
             filename = QtGui.QFileDialog.getSaveFileName(QtGui.QApplication.activeWindow(), translate("Arch","Export CSV File"), None, "CSV file (*.csv)");
             if filename:
-                with open(filename[0].encode("utf8"), 'wb') as csvfile:
+                if sys.version_info.major < 3:
+                    mode = 'wb'
+                else:
+                    mode = 'w'
+                with open(filename[0].encode("utf8"), mode) as csvfile:
                     csvfile = csv.writer(csvfile,delimiter="\t")
                     suml = 0
                     for i in range(rows):