revert regex
modified:   niftynet/utilities/user_parameters_regex.py
@@ -101,7 +101,7 @@ if __name__ == "__main__":
if matched_str:
filtered_groups = filter(None, matched_str.groups())
if filtered_groups:
- values = [v.strip() for v in filtered_groups[0].split(',')]
+ values = [v.strip() for v in list(filtered_groups)[0].split(',')]
else:
values = []
print('String:', strval, 'Matched!', values)
