由于 csvreader 无限循环

Question

嘿，我正在制作一个游戏，你必须只用第一个字母猜一首歌的名字，如果你猜错了，一旦你得到更多的字母两次，游戏就结束了。（未完成）但我有运行进入我的歌曲 csv 文件的阅读不会结束并永远循环的地方。我不得不使用 ^C 键盘中断来结束它。该代码有时有效，有时无效。

import random

path = __file__.replace("main.py", "")
file = open(path + "users.csv", "r+")
writer = csv.writer(file)
header = next(file)
logged = False

answer = input("Sign up or Log in? (sign/log)\n")
if answer == "sign":
    username = input("Username: ")
    password = input("Password: ")
    answer = input("Confirm Password: ")
    while answer != password:
        print("Passwords do not match")
        password = input("Password: ")
        answer = input("Confirm Password: ")
    writer.writerow([username, password, 0])
    logged = True
elif answer == "log":

    username = input("Username: ")
    password = input("Password: ")



    for line in file:
        if username in line:
            if password in line:
                print("Hey there " + username + ", you have been logged in!")
                logged = True
                break
            else:
                print("Your password is incorrect. Please start again.")
                exit()

if logged != True:
    try:
        print("User " + username + " is not found. Please try again or make an account.")
        exit()
    except:
        print("Something went wrong please try again.")
        exit()
file.close()

songFile = open(path + "songs.csv", "r")
csvreader = csv.reader(songFile)
header = next(csvreader)

score = 0

while True:
    randomSongID = str(random.randint(1, 603))
    for row in csvreader:
        if randomSongID == row[0]:
            randomSong = row[1]
            actualSong = randomSong
            artist = row[2]
            randomSong = randomSong.split(" ")

            for i in range(len(randomSong)):
                randomSong[i] = randomSong[i][0] + (len(randomSong[i]) - 1) * "_"
            print(actualSong)
            randomSong = " ".join(randomSong)
            answer = input(randomSong + " By " + artist+ "\n" + randomSong[0])

            if answer != actualSong[1:]:
                print("You have got it incorrect once. You have one more chance here is a hint.")
                hint = list(actualSong[::2])
                hint = "_".join(hint)
                print(hint)
                answer = input(randomSong[0])
                if answer != actualSong[1:]:
                    print("The song name was:", actualSong)
                    print("You lost " + username + ". Your score was", score)
                    exit()
                else:
                    score += 5
                    break
            else:
                score += 10
                break

这就是我的终端的样子：

~/Project/ $ python main.py
Sign up or Log in? (sign/log)
log
Username: d
Password: d
Hey there d, you have been logged in!
Just the Way You Are
J___ t__ W__ Y__ A__ By Bruno Mars
Jno
You have got it incorrect once. You have one more chance here is a hint.
J_s_ _h_ _a_ _o_ _r
Just the Way You Are
She Looks So Perfect
S__ L____ S_ P______ By 5 Seconds of Summer
Sno
You have got it incorrect once. You have one more chance here is a hint.
S_e_L_o_s_S_ _e_f_c
Sno
The song name was: She Looks So Perfect
You lost d. Your score was 5
~/Project/ $ python main.py
Sign up or Log in? (sign/log)
log
Username: d
Password: d
Hey there d, you have been logged in!
This Is How We Do
T___ I_ H__ W_ D_ By Katy Perry
This Is How We Do
^CTraceback (most recent call last):
  File "/home/ubuntu/School/Project/main.py", line 55, in <module>
    for row in csvreader:
  File "/usr/local/lib/python3.9/codecs.py", line 319, in decode
    def decode(self, input, final=False):
KeyboardInterrupt

~/Project/ $

中断是在它刚刚停止的地方没有退出或任何东西，只是变成静态的。感谢您的帮助！

编辑：以防万一那些需要 csv 文件的人，这里有一个示例和 header。

id,title,artist,top genre,year,bpm,nrgy,dnce,dB,live,val,dur,acous,spch,pop
1,Hey, Soul Sister,Train,neo mellow,2010,97,89,67,-4,8,80,217,19,4,83
2,Love The Way You Lie,Eminem,detroit hip hop,2010,87,93,75,-5,52,64,263,24,23,82
3,TiK ToK,Kesha,dance pop,2010,120,84,76,-3,29,71,200,10,14,80
4,Bad Romance,Lady Gaga,dance pop,2010,119,92,70,-4,8,71,295,0,4,79
5,Just the Way You Are,Bruno Mars,pop,2010,109,84,64,-5,9,43,221,2,4,78
6,Baby,Justin Bieber,canadian pop,2010,65,86,73,-5,11,54,214,4,14,77
7,Dynamite,Taio Cruz,dance pop,2010,120,78,75,-4,4,82,203,0,9,77
8,Secrets,OneRepublic,dance pop,2010,148,76,52,-6,12,38,225,7,4,77
9,Empire State of Mind (Part II) Broken Down,Alicia Keys,hip pop,2010,93,37,48,-8,12,14,216,74,3,76
10,Only Girl (In The World),Rihanna,barbadian pop,2010,126,72,79,-4,7,61,235,13,4,73

Answer 1

这实际上是由于 csvreader class 的行为造成的。一旦你迭代了一次，它里面就没有任何东西了，所以试图再次迭代它会产生一个空列表。您需要做的是通过遍历输出来构建一个列表，然后不再使用该对象，因为它已经变得毫无用处了。

songFile = open(path + "songs.csv", "r+")
csvreader = csv.reader(songFile)
header = next(csvreader)
rows = [row for row in csvreader]


score = 0

while True:
    randomSongID = str(random.randint(1, 601))
    for row in rows:

这是应该可以解决您的问题的固定代码片段

由于 csvreader 无限循环

Looping unlimitedly because of csvreader

python

csv

for-loop

while-loop

csvreader