Note about long lines: I did not touch to two pieces of code (because I don’t see any way to keep a nicely formated, compact code, with shorter lines):
* The node types definitions into rna_nodetree_types.h
* The vgroup name functions into rna_particle.c
vecs = Camera.view_frame(scene)
returns 4 points for the camera frame, without this its very hard to know if a point is in the camera view or not, without rewriting blenders internal logic in python.