Hello, very very new to Dynamo and Python. I know this should be a very easy script haha. I am trying to replace the empty value on the first list, with the corresponding index value on the second list. Could anyone help me out with this? 
@notkssy Try the following
data = IN[0]
replac = IN[1]
for ind , (item1 , item2) in enumerate (zip (data , replac )):
if item1 == "" :
data[ind] = replac[ind]
OUT = data
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Yes, thank you 
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