Remove expressions from file knob on all Reads in Nuke.

remove_filepath_expression.py

import nuke
import os.path

reads = nuke.allNodes('Read')
err_cnt = 0
for i, r in enumerate(reads):
    raw = r.knob('file').getValue()
    evaluated = r.knob('file').getEvaluatedValue()
    full_path = '{}/{}'.format(os.path.dirname(evaluated), os.path.basename(raw))
    try:
        r.knob('file').setValue(full_path)
        print('[Info] {}:\n"{}"->\n"{}"\n\n'.format(r.name(), raw, full_path))
    except Exception, e:
        print(e)
        print('[Error] Skipp: {}'.format(r.name()))
        err_cnt += 1
if err_cnt == 0:
    print('# Done all successfully.')
else:
    print('# Error has occured. Please check log.')