Good PDF parser/form filler?

[Cem Karan]

Hi all, I'm currently looking for a PDF parser/writer library so I can programmatically fill in some PDF forms.  I've found PDF2 (https://pypi.python.org/pypi/PyPDF2/1.24), and report lab (https://pypi.python.org/pypi/reportlab), and I can see that there are a LOT more PDF frameworks out there on pypi, but I wanted to know what kinds of experiences others have had with them so I can choose a reasonably good one.  Note that I'm not creating brand-new PDF files, but filling in ones I've already gotten.

My requirements:
- Must work with python 3.4
- Must work on OS X (only a real problem for extension classes, etc.)
- Ideally pure python with few dependencies.
- NOT shoveling data out to the internet!  MUST be wholly contained on my machine!

Thanks in advance for any help!

Thanks,
Cem Karan