Hi !
Do you think it is possible to import the zbar library in a further release or Pythonista ?
http://zbar.sourceforge.net
Zbar already exists on iOS and there are some wrappers in Python.
We could script a QRCode decoder for example with camera input directly in Pythonista.
Or if somebody knows a pure Python QRCode decoder, I would be very very very happy but unfortunately I don't think it exists...