uicparser.py crashes when a radio buttons are assigned to a button group

I was trying to write some GNU gettext compatible pyside-uic script using the tools from uicparser.py. All worked fine until I tried to assign radio buttons to a button group and then compile the resource files (created with Qt Designer) to Python files. I was somehow able to resolve the problem by changing the file uicparser.py, line 212. I replaced

bg_name = bg_i18n.string

by

try:
bg_name = bg_i18n.string
except AttributeError:
bg_name = bg_i18n

Now it seems to work.