Fix invalid regular expression warnings

python/plugins/processing/algs/qgis/ui/FieldsCalculatorDialog.py

@@ -169,8 +169,8 @@ def selectFile(self):
             filename = str(files[0])
             selectedFileFilter = str(fileDialog.selectedNameFilter())
             if not filename.lower().endswith(
-                    tuple(re.findall("\*(\.[a-z]{1,10})", fileFilter))):
-                ext = re.search("\*(\.[a-z]{1,10})", selectedFileFilter)
+                    tuple(re.findall("\\*(\\.[a-z]{1,10})", fileFilter))):
+                ext = re.search("\\*(\\.[a-z]{1,10})", selectedFileFilter)
                 if ext:
                     filename = filename + ext.group(1)
             self.leOutputFile.setText(filename)

python/plugins/processing/gui/BatchOutputSelectionPanel.py

@@ -84,8 +84,8 @@ def showSelectionDialog(self):
                                                                    self.tr('Save file'), path, filefilter)
         if filename:
             if not filename.lower().endswith(
-                    tuple(re.findall("\*(\.[a-z]{1,10})", filefilter))):
-                ext = re.search("\*(\.[a-z]{1,10})", selectedFileFilter)
+                    tuple(re.findall("\\*(\\.[a-z]{1,10})", filefilter))):
+                ext = re.search("\\*(\\.[a-z]{1,10})", selectedFileFilter)
                 if ext:
                     filename += ext.group(1)
             settings.setValue('/Processing/LastBatchOutputPath', os.path.dirname(filename))