Eliminar Agregar reemplazar contente de CSV usando Python

import csv

original = open("original.csv", 'r')
original = ''.join([i for i in original]) \
    .replace("C-F", "F-C") \
    .replace("G-F", "F-G")
x = open("edited.csv", "w")
x.writelines(original)
x.close()
Bored Beaver