Netpbmfile is a Python library to read and write image files in the Netpbm format as specified at http://netpbm.sourceforge.net/doc/.

The following Netpbm and Portable FloatMap formats are supported:

PBM (bi-level)
PGM (grayscale)
PPM (color)
PAM (arbitrary)
XV thumbnail (RGB332, read-only)
PF (float32 RGB, read-only)
Pf (float32 grayscale, read-only)

No gamma correction is performed. Only one image per file is supported.