Naive lookup for missing files in Nuke for given frame.

nuke_missing_frames.py

import fileseq

def missing_files(num):

    for node in nuke.allNodes('Read'):
    
        path = node.knob("file").value()
        seq = fileseq.FileSequence(path)
        path = seq.frame(num)
        
        if not os.path.isfile(path):
            yield path

for path in missing_files(134):
    print "Missing file", path