nans.py

numpy masked array to deal with NaNs

http://research.endlessfernweh.com/basic-plotting-in-python/

nans_Interpolation.py

example for interpolating at NaN places

Note that author advice scipy.interpolate() over numpy.interp() because it has support for 2D arrays/images. And He provides an example for that from the link below

http://research.endlessfernweh.com/nans/