Int Argument必须是字符串或数字，而不是列表，Python csv

Question

def load_asn1_data(filename='songdata.csv'):
    import csv
    reader=csv.reader(open(filename,'r'))
    songs=[]
    for r in reader:
        songs.append(r)
    return songs
def fastest_year(songs):
    for row in songs:
        title = row[0]
        artist = row[1]
        year = int(row[2])
        tempo = float(row[3])
        artist_hotness=float(row[4])
        duration = float(row[5])
        key = int(row[6])
        loudness = float(row[7])
        mode = int(row[8])
    for speed in tempo:
        if tempo[speed]==max(tempo):
            print year[speed]

songs=load_asn1_data(filename='songdata.csv')
fastest_year(songs)

Update: So, now that I know that the first index refers to rows, I made a for-loop in which each variable corresponds to the value of a particular index in a row. If I try to run this, then I get a new error, float object is not iterable. I thought that maybe the max function doesn't work for floats, but I tested it, and it does. I'm confused, since I am interpreting my last for-loop as, for all elements in the "tempo class", if the tempo at that index is the largest, print the year associated with that tempo.

Answer 1

if this is the error you are receiving:

TypeError: int() argument must be a string or a number, not 'list'

then your songs[2] might be like this [2010] or [xxxx, xxxx]

please check it by printing either songs[2] or type(songs[2])

please make it songs[2][0]

year = int(songs[2][0])

Answer 2

songs is a list of lists, in the fastest_year function you're actually accessing rows, not columns. You will need to look through each row in songs to get the values you want. Something like:

songs=load_asn1_data(filename='songdata.csv')
for song in songs:
    fastest_year(song)

Although without knowing exactly what the code is meant to do I can't say if that will work exactly for your purposes.