.ipynb .pdf

Binder

Contents

If running in the main lesson Notebook:

oldfile = open("sortedfriends.txt", "r")

contents = oldfile.readlines()

N = len(contents) 

with open("backwardsfriends.txt", "w") as newfile:
    for i in range(-1, -N, -1):
        newfile.write(contents[i])
    

If running in the solutions notebook:

• need to refer to the folder above the solutions folder using the ../ syntax:

oldfile = open("../sortedfriends.txt", "r")

contents = oldfile.readlines()

N = len(contents) 

with open("backwardsfriends.txt", "w") as newfile:
    for i in range(-1, -N, -1):
        newfile.write(contents[i])