我的 python 程序不断返回"KeyError: 20"

Question

我已经在python中写了一个程序，该程序应该返回每个级别的最高得分播放器，但是它不断返回69行的" keyError：20"（p_l1 = plorese_ts [h_l1]）），我无法弄清楚如何解决此问题。在我的代码中，我打开一个称为" playerscores.txt"的文本文件，该文件的格式如下：
月亮，3,15
Starplayer，2,18
Ellie，5,9
等。
这是我的代码：

    print("The highest scorers for each leve are:n")
    PS3=open("PlayerScores.txt","r").read().split("n")
    level1_scores=[]
    players_TS={}
    level2_scores=[]
    players_T2={}
    level3_scores=[]
    players_T3={}
    level4_scores=[]
    players_T4={}
    level5_scores=[]
    players_T5={}
    for line in PS3:
        lines=line.split(",")
        player=lines[0]
        level=lines[1]
        score=lines[2]
        erros=open("scoreboard_errorlog.text","w")
        if int(score)>20:
            errors.write(score)
        if int(level)>5:
            errors.write(level)
        if int(level)==1:
            level1_scores.append(int(score))
            players_TS.setdefault(score,[]).append(player)
        if int(level)==2:
            level2_scores.append(int(score))
            players_T2.setdefault(score,[]).append(player)
        if int(level)==3:
            level3_scores.append(int(score))
            players_T3.setdefault(score,[]).append(player)
        if int(level)==4:
            level4_scores.append(int(score))
            players_T4.setdefault(score,[]).append(player)
        if int(level)==5:
            level5_scores.append(int(score))
            players_T5.setdefault(score,[]).append(player)
    H_L1=max(level1_scores)
    P_L1=players_TS[H_L1]
    H_L2=max(level2_scores)
    P_L2=players_T2[H_L2]
    H_L3=max(level3_scores)
    P_L3=players_T3[H_L3]
    H_L4=max(level4_scores)
    P_L4=players_T4[H_L4]
    H_L5=max(level5_scores)
    P_L5=players_T5[H_L5]
    print("LeveltPlayer nametScorenLevel 1t",P_L1,"t",H_L1,"nLevel 2t",P_L2,"t",H_L2,"nLevel 3t",P_L3,"t",H_L3,"nLevel 4t",P_L4,"t",H_L4,"nLevel 5t",P_L5,"t",H_L5)

帮助您将不胜感激。

Answer 1

这里出现的问题：

if int(level)==1:
    level1_scores.append(int(score))
    players_TS.setdefault(score,[]).append(player)

假设score == "20"。您将 Integer 20添加到level1_scores，但使用 String "20"作为players_TS中的键。然后，当您进入这些行

时

H_L1=max(level1_scores)
P_L1=players_TS[H_L1]

H_L1是整数 20，但是players_TS中的所有键都是"20"之类的字符串。自20 != "20"以来，KeyError结果。

可能，您想拥有 score（而 level，就此而言）是整个整数，因此在解析后立即将其转换一次，然后使用 score，如循环的其余部分。

for line in PS3:
    lines = line.split(",")
    player = lines[0]
    level = int(lines[1])
    score = int(lines[2])
    with open("scoreboard_errorlog.text","w") as errors:
        if score > 20:
            errors.write(score)
        if level > 5:
            errors.write(level)
    if level == 1:
        level1_scores.append(score)
        players_TS.setdefault(score,[]).append(player)
    elif level == 2:
        level2_scores.append(score)
        players_T2.setdefault(score,[]).append(player)
    elif level == 3:
        level3_scores.append(score)
        players_T3.setdefault(score,[]).append(player)
    elif level == 4:
        level4_scores.append(score)
        players_T4.setdefault(score,[]).append(player)
    elif level == 5:
        level5_scores.append(score)
        players_T5.setdefault(score,[]).append(player)
    H_L1 = max(level1_scores)
    P_L1 = players_TS[H_L1]
    H_L2 = max(level2_scores)
    P_L2 = players_T2[H_L2]
    H_L3 = max(level3_scores)
    P_L3 = players_T3[H_L3]
    H_L4 = max(level4_scores)
    P_L4 = players_T4[H_L4]
    H_L5 = max(level5_scores)
    P_L5 = players_T5[H_L5]

但是，您还应该使用dict s存储许多此数据，而不是单独命名的变量。

level_scores = {level: [] for level in range(1,6)}
players = {}
for line in PS3:
    lines = line.split(",")
    player = lines[0]
    level = int(lines[1])
    score = int(lines[2])
    # Use append mode, or you overwrite the file each time through the loop
    with open("scoreboard_errorlog.text", "a") as errors:
        if score > 20:
            errors.write(score)
        if level > 5:
            errors.write(level)
            continue
    level_scores[level].append(score)
    players[level].setdefault(score,[]).append(player)

H = {}
P = {}
for level in range(1,6):
    H[level] = max(level_scores[level])
    P[level] = players[level][H[level]]