Python barcode decoding

[Robocop]

Does anyone know of any decent (open source or commercial) python
barcode recognition tools or libraries.  I need to read barcodes from
pdfs or images, so it will involve some OCR algorithm.  I also only
need to read the code 93 symbology, so it doesn't have to be very
fancy.  The most important thing to me is that it outputs in some
python friendly way, or ideally that it is written in python.  Any
tips would be great!