list not shuffling python -

the code have here should shuffle list contains "ace of hearts" "two of hearts" , "three of hearts".

it retrieves them file well, won't shuffle them , prints list twice. far know, list can include words - seems mistaken.

import random def cards_random_shuffle():     open('cards.txt') f:         cards = [words.strip().split(":") words in f]         f.close()     random.shuffle(cards)     print(cards)     return cards 

i assume problem loop on lines in file for words in f when want first line of file.

assuming file looks this:

ace of hearts:two of hearts:three of hearts

then need use first line:

import random def cards_random_shuffle():     open('cards.txt') f:         firstline = next(f)         cards = firstline.strip().split(':')         # alternative read in whole file:         # cards = f.read().strip().split(':')     print(cards)    # original order     random.shuffle(cards)     print(cards)    # new order     return cards 

wiki