import shutil
import datetime
import os
import fileinput

original_file = "\network\path\to\file"

def date_rename_file():
    todays_date = datetime.datetime.now()
    stripped_time = todays_date.strftime('%Y%m%d')
    shutil.copyfile(original_file, "\network\path\to\backupfolder\device_"+str(stripped_time)+".txt")

def device_id_replace():
    original_id = input("What device ID are you needing to replace?")
    new_id = input("What is the new device ID?")
    with open(original_file, 'w') as devicetxt:
        for line in devicetxt:
            print(line)
            if original_id in line:
                print("Found "+original_id)

date_rename_file()
device_id_replace()