Python 帮助搜索列表

Question

"""read file and store into database"""
f = open('C:\Users\user.name\Desktop\tunes.txt','r')
artist=[""]
song=[""]
album=[""]
genre=[""]
index=0
for line in f:
    if index==0:
        artist.append(line)
        index=index+1
    elif index==1:
        song.append(line)
        index=index+1
    elif index==2:
        album.append(line)
        index=index+1
    elif index==3:
        genre.append(line)
        index=index+1
    elif index==4:
        index=0   
while 1:
    selection = int(raw_input("Please select the number that corresponds with what you would like to do.n1.Searchn2.Recommendn3.Editn4.Saven"))
    if selection == 1:
        print "You selected Search"
        searchselection = int(raw_input("Please select the number that corresponds with what you would like to do.n1.Display All Songsn2.Display All Artistsn3.Search By Artistn4.Display All Genresn5.Search by Genren6.Display All Playlistsn7.Search By Playlistn"))                               
        if searchselection == 1:
           print '[%s]' % ''.join(map(str, song))
        elif searchselection == 2:
            print '[%s]' % ''.join(map(str, artist))
        elif searchselection == 3:
            artistsearch = str(raw_input("nWhat artist are you searching for?n"))
            artist.index(artistsearch)
            print value
        elif searchselection == 4:
            print '[%s]' % ''.join(map(str, genre))
        elif searchselection == 5:
            print "display"
        elif searchselection == 6:
            print "display"
        elif searchselection == 7:
            print "display"
        break
    elif selection == 2:
        print "You selected recommend."
        recommendselection = int(raw_input("Please select the number that corresponds with what you would like to do.n1.Recommend by Song Titlen2.Recommend by Artist Namen"))
        if recommendselection == 1:
            songrec = str(raw_input("Please enter the song titlen"))
        elif recommendselection == 2:
            artistrec = str(raw_input("Please enter the Artist's namen"))
        break
    elif selection == 3:
        print "You selected edit."
        editselection = int(raw_input("Please select the number that corresponds with what you would like to do.n1.Add a New Songn2.Create New Playlistn3.Add a song to a current playlist"))
        if editselection == 1:
            songadd = str(raw_input("Please enter the EVERYTHINGn"))
        elif editselection == 2:
            playistcreate = str(raw_input("Please enter the name of the Playlistn"))
        elif editselection == 3:
            playlistadd = str(raw_input("Please enter the name of the playlistn"))      
        break
    elif selection == 4:
        print "You selected Save."
        f.close()
        break

这就是我目前所拥有的。这是一个正在进行的 python 项目，现在我被难住了;我正在尝试按艺术家搜索，例如如果用户将贾斯汀汀布莱克输入为"艺术家搜索"，那么我希望提取索引，以便我可以匹配歌曲列表中的索引并向用户显示该信息。

任何帮助确定为什么贾斯汀汀布莱克不是列表中的值，即使当我运行显示所有艺术家选项时显示名称，将不胜感激。

为匹配列表索引指明正确的方向也很棒。这是曲调的一个例子.txt：

Alicia Keys
No One
As I Am
R&B/Soul;Syl tunes
Everything But the Girl
Missing
Amplified Heart
Alternative;Syl tunes
Gathering Field
Lost In America
Lost In America
Rock
Ellie Goulding
Burn
Halcyon
Pop;Road tunes
Justin Timberlake
Mirrors
Mirrors (Radio Edit) - Single
Pop;Syl tunes

Answer 1

我认为您应该为要存储的数据创建一个特定的类，然后创建一个实例化此类的对象列表：

class Song():
    """Class to store the attributes for each song"""
    def __init__ (self):
        self.artist = ""
        self.song = ""
        self.album = ""
        self.genre = ""
# List to store all the Song objects
songs_list = []
f = open('C:\Users\user.name\Desktop\tunes.txt','r')
index=0
for line in f:
    # Instantiate an empty Song object
    s = Song()
    if index == 0:
        s.artist = line
        index=index+1
    elif index == 1:
        s.song = line
        index = index + 1
    elif index == 2:
        s.album = line
        index = index + 1
    elif index == 3:
        s.genre = line
        index = index+1
    elif index == 4:
        index = 0
    songs_list.append(s)