CODEWITHSUNDEEP
pythondictionarytuples
user9881191
user9881191

Reputation: 1

How do I access an element in a tuple that is stored in a dict?

song_lyrics_per_year={year:[(song, singer, lyrics),(song2, singer2, lyrics2)...], year2: ....}

Hello, I have a dict with year as keys and as values lists of tuples (consisting of song, singer, lyrics). No, I need to access all 3 elements separately and parse them into a list

onlysongs=[]
onlyartists=[]

However, all my tries have failed so far, including list comprehensions and codes that were suggested here.

Shouldn't this work?

for item in song_lyrics_per_year.values():
    onlyartists.append(item[1])

In response, I get an "IndexError: list index out of range"

Only a few weeks into Python and I went through all old answers on this topic and tried the solutions...they did not work, unfortunately.

Thanks for your help!

Upvotes: 0

Views: 425

Answers (3)

accdias
accdias

Reputation: 5372

I guess it would be clearer this way:

for year in song_lyrics_per_year:
    for song_lyric in song_lyrics_per_year[year]:
        song, singer, lyrics = song_lyric
        if singer not in onlyartists:
            onlyartists.append(singer)

Edited: to keep track of how often an artist appears you can use collections.Counter(). Here is a complete example:

from collections import Counter

singers = Counter()
years = { 
    2018: [
        ('Title1', 'Singer1', 'Lyrics1'),
        ('Title2', 'Singer1', 'Lyrics2')
    ],
    2019: [
        ('Title3', 'Singer3', 'Lyrics3')
    ]
}

for year in years:
    for song in years[year]:
        title, singer, lyrics = song
        singers.update((singer,))

for singer, hits in singers.most_common():
    print(singer, hits)

And here is the output:

Singer1 2
Singer3 1

Upvotes: 0

Vizag
Vizag

Reputation: 773

for value in song_lyrics_per_year.values():
    for i in range(0,len(value)-1):
        onlysongs.append(value[i][0])
        onlyartists.append(value[i][1])

Thanks for the edit @Austin.

Upvotes: 0

Hitobat
Hitobat

Reputation: 3037

I think you're missing 1 level of list. Try something like:

for songs_in_single_year in song_lyrics_per_year.values():
    for song in songs_in_single_year:
        onlyartists.append(song[1])

Upvotes: 1

Related Questions