如何隨機打亂一個串列，然后以5個專案為一組提供它

我正在嘗試撰寫一個程式，該函式將在串列中隨機播放，并且只給我前 5 首歌曲。然后當我問用戶，你想看更多嗎，用戶回答是，我想讓它列印接下來的 5 首并繼續下去，直到沒有更多的歌曲剩下。我已經為此作業了好幾天并且被卡住了。如果有人可以提供幫助，這是我的代碼。

video_id_to_title = {
    5390161: "Who Want Smoke",
    7736243: "INDUSTRY BABY",
    8267507: "STAY",
    1012930: "Style",
    1109274: "bad guy",
    2981023: "Blank Space",
    4922599: "Love Nwantiti Remix",
    4559658: "Essence (Official Video)",
    9897626: "Pepas",
    5610524: "Outside (Better Days)",
    6980497: "Lo Siento BB:/",
    4547223: "Face Off",
    9086699: "Heat Waves",
    3720918: "Despacito",
    9086691: "Royals",
    1461025: "Fancy Like",
    7434914: "Way 2 Sexy",
    6093037: "Corta Venas",
    6438692: "Need to Know",
    8117542: "MONEY",
    5746821: "Wild Side ",
    9566779: "Knife Talk",
    1683724: "Life Support",
    5718817: "Save Your Tears",
    2459304: "Ghost",
    6382983: "Love Yourself",
    7394792: "7 rings",
}


top_hits_playlist = [
    5390161, 7736243, 8267507, 4922599, 4559658, 9897626, 1461025, 5746821,
    9566779, 5718817, 2459304, 6382983, 7394792
]

def display_full_playlist(playlist_id: int):
   user_playlist_choice = input("Which playlists do you want to see? ")
   answer = input("Do you want to see more?")
   song = 5
   if user_playlist_choice == "Top Hits" or "top hits":
    for i,x in enumerate(top_hits_playlist):
     print(video_id_to_title[x])
     if song == x:
      print(answer)
    if answer == "yes" or answer == "Yes":
      print()
      song  = 5

uj5u.com熱心網友回復：

我正在嘗試撰寫一個程式，該函式將在串列中隨機播放，并且只給我前 5 首歌曲。然后當我問用戶，你想看更多嗎，用戶回答是，我想讓它列印接下來的 5 首并繼續下去，直到沒有更多的歌曲剩下。

基于此問題陳述，我建議首先使用類似的方法隨機化播放串列中的整個視頻 ID 串列random.shuffle，這樣效率更高 - 因為您只需要對串列進行一次隨機播放，而不是在串列中生成隨機索引然后不斷迭代并將其從串列中洗掉，這也會使其更難閱讀。如果目標是改變播放串列本身的順序，那么這種方式應該更容易。

例如：

import random

video_id_to_title = {
    5390161: "Who Want Smoke",
    7736243: "INDUSTRY BABY",
    8267507: "STAY",
    1012930: "Style",
    1109274: "bad guy",
    2981023: "Blank Space",
    4922599: "Love Nwantiti Remix",
    4559658: "Essence (Official Video)",
    9897626: "Pepas",
    5610524: "Outside (Better Days)",
    6980497: "Lo Siento BB:/",
    4547223: "Face Off",
    9086699: "Heat Waves",
    3720918: "Despacito",
    9086691: "Royals",
    1461025: "Fancy Like",
    7434914: "Way 2 Sexy",
    6093037: "Corta Venas",
    6438692: "Need to Know",
    8117542: "MONEY",
    5746821: "Wild Side ",
    9566779: "Knife Talk",
    1683724: "Life Support",
    5718817: "Save Your Tears",
    2459304: "Ghost",
    6382983: "Love Yourself",
    7394792: "7 rings",
}

video_ids = list(video_id_to_title)

# Shuffle the list, so all the elements are randomized
random.shuffle(video_ids)

# Set chunk size, so we get x videos from the playlist at a time
chunk_size = 5

# Split list into sub-lists of at most 5 elements each
video_id_chunks = [video_ids[x:x   chunk_size]
                   for x in range(0, len(video_ids), chunk_size)]

# Print each sub-list with randomized video ids
for chunk in video_id_chunks:
    print(chunk)

輸出（每次應該以不同的順序）：

[1012930, 4547223, 7394792, 7736243, 9086691]
[6980497, 2459304, 8117542, 7434914, 9566779]
[5390161, 6093037, 6438692, 4559658, 2981023]
[8267507, 4922599, 9086699, 5610524, 6382983]
[1683724, 1461025, 9897626, 1109274, 5746821]
[3720918, 5718817]

uj5u.com熱心網友回復：

from random import shuffle

video_id_to_title = {
    5390161: "Who Want Smoke",
    7736243: "INDUSTRY BABY",
    8267507: "STAY",
    1012930: "Style",
    1109274: "bad guy",
    2981023: "Blank Space",
    4922599: "Love Nwantiti Remix",
    4559658: "Essence (Official Video)",
    9897626: "Pepas",
    5610524: "Outside (Better Days)",
    6980497: "Lo Siento BB:/",
    4547223: "Face Off",
    9086699: "Heat Waves",
    3720918: "Despacito",
    9086691: "Royals",
    1461025: "Fancy Like",
    7434914: "Way 2 Sexy",
    6093037: "Corta Venas",
    6438692: "Need to Know",
    8117542: "MONEY",
    5746821: "Wild Side ",
    9566779: "Knife Talk",
    1683724: "Life Support",
    5718817: "Save Your Tears",
    2459304: "Ghost",
    6382983: "Love Yourself",
    7394792: "7 rings"
}

# get song id's in a random order
top_hits_playlist = list(video_id_to_title.keys())
shuffle(top_hits_playlist)
def get_next_n_song(n):
    return [video_id_to_title[(top_hits_playlist.pop(0))] for _ in range(min(len(top_hits_playlist), n))]

if __name__ == "__main__":
    user_playlist_choice = input("\nWhich playlists do you want to see?\n\t")
    if "top hits" in user_playlist_choice.lower():
        while True:
            songs = get_next_n_song(5)
            print('\n'.join(songs))
            if len(songs) < 5: break
            answer = input("\nDo you want to see more?\n\t")
            if "no" in answer.lower(): break

uj5u.com熱心網友回復：

您可以創建一個迭代器，提供 5 個塊，并在需要時使用 next() 函式獲取下一個塊：

import random
top_hits_playlist = [
    5390161, 7736243, 8267507, 4922599, 4559658, 9897626, 1461025, 5746821,
    9566779, 5718817, 2459304, 6382983, 7394792
]

random.shuffle(top_hits_playlist)
get5 = ( top_hits_playlist[i:i 5] for i in range(0,len(top_hits_playlist),5) )

songs = next(get5,None)
while songs:
    print(songs)
    songs = next(get5,None)
    if not songs: break
    input('5 more')

    
[9566779, 7394792, 5390161, 5746821, 6382983]
5 more
[7736243, 8267507, 5718817, 1461025, 2459304]
5 more
[9897626, 4922599, 4559658]

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