如何修复列表列表索引超出范围

Question

I am having problems with this line. I am not really sure why it gives me list index out of range. I've tried couple of solutions so far none of them worked.

def endGame(points):
    scoreboard = []
    with open("scoreboard.csv", "a") as scoreboardFile:
        scoreboardWriter = csv.writer(scoreboardFile)
        scoreboardWriter.writerow(name, points)
    scoreboardFile = open("scoreboard.csv", "rt")
    scoreboardReader = csv.reader(scoreboardFile)
    for i in scoreboardReader:
        scoreboard.append([i[0], int(i[1])])

 Traceback (most recent call last): File "E:\Nea\NEA-PROJECT.py", line 127, in <module> endGame(points) File "E:\Nea\NEA-PROJECT.py", line 25, in endGame scoreboard.append([i[0], int(i[1])]) IndexError: list index out of range

This is supposed to write the name of the user and the score they achieved. The thing that confuses me is that it works the name and the score is saved on the file, but it gives me index list out of range.

Answer 1

You can just append the whole row at once in the for loop. Otherwise the line you had [i[0], int(i[1])] will fail when it finds a row in the scoreboard.csv that is empty (or has only 1 character), and then it tries to index into that.

Also you need to pass an iterable (like a list) to the writerow method, since as you can see from the docs it only takes one argument.

def endGame(points):
    scoreboard = []
    with open("scoreboard.csv", "a") as scoreboardFile:
        scoreboardWriter = csv.writer(scoreboardFile)
        scoreboardWriter.writerow([name, points])  # CHANGED
    scoreboardFile = open("scoreboard.csv", "rt")
    scoreboardReader = csv.reader(scoreboardFile)
    for i in scoreboardReader:
        scoreboard.append(i)  # CHANGED

Answer 2

import csv
scoreboard = []
with open("scoreboard.csv", "w", newline='') as scoreboardFile:
    scoreboardWriter = csv.writer(scoreboardFile)
    scoreboardWriter.writerow(('bugbeeb', 20))
with open("scoreboard.csv", "r") as  scoreboardFile:
    scoreboardReader = csv.reader(scoreboardFile)
    for row in scoreboardReader:
        scoreboard.append(row)

this should work for you