import os
import nuke 
import nukescripts
import sys

fileName=os.listdir("/mnt/intern/home/cdeorsay/Desktop/pythonIdea/images")
numfiles=len(fileName)
k=0
print(numfiles)

totalwidth= 4*512
totalHeight = (numfiles/4) * 200
totalRows=numfiles/4

ContactSheet=nuke.nodes. ContactSheet(roworder = 'TopBottom', width=totalwidth, height=totalHeight, rows=totalRows)

while (k<numfiles):
    filePath= "/home/cdeorsay/Desktop/pythonIdea/images/"+ fileName[k]
    read=nuke.createNode ( "Read","file {"+filePath+"}", inpanel =True )
    reformat= nuke.nodes.Reformat(type='to box', box_width ='512', box_height='200', resize="fill", black_outside=True,box_fixed=True )
   
    reformat.setInput(0, read)
    ContactSheet.setInput(k, reformat)
    k=k+1
    print(filePath)


viewer=nuke.createNode ("Viewer")
viewer.setInput(0, ContactSheet)