import os
import pandas as pd
from datetime import datetime

# Update input csv files
files = ["input-1.csv", "input-2.csv"]

n = 2
for file in files:
    n = n + 1
    print(file)
    input = pd.read_csv(file, header=0)
    input["lastupdated"] = datetime.now()
    input.to_csv("output-" + str(n) + ".csv", index=False)
    print(input)