PyMuPDF
Python bindings for MuPDF's rendering library.
...The viewer is small, fast, yet complete. It supports many document formats, such as PDF, XPS, OpenXPS, CBZ, EPUB, and FictionBook 2. You can annotate PDF documents and fill out forms with the mobile viewers (this feature is coming soon to the desktop viewer as well). The command line tools allow you to annotate, edit, and convert documents to other formats such as HTML, SVG, PDF, and CBZ.