卡牌游戏登录系统异常：无法正确读取CSV并展示登录用户名

我为一款卡牌游戏开发的登录系统曾运行正常，目前出现异常：无论重新登录已有玩家，还是注册新玩家，系统始终返回Welcome 'finley' and janet!的提示信息——这两个是CSV文件中的前两个用户名，并非当前登录的用户。

使用的代码（开发工具：PyScripter，CSV编辑工具：VSC） #

import csv
import random
import keyboard


# create a list to store the usernames and passwords of both players
players = []
key = True
# read existing users from the CSV file
with open('ScoreSheet.csv', 'r') as file:
    reader = csv.reader(file)

    next(reader)
    for row in reader:
        players.append(row)

# loop through each player
for i in range(2):

    # ask if the player has made a username and password before
    newUser = input(f"Player {i+1}, have you made a username and password before? ").strip()

    # if the player is new, ask for their name and password and add them to the list and CSV file
    if newUser == 'no':
        newName = input(f"Player {i+1}, what is your first name? ").strip()
        newPassword = input(f"Player {i+1}, what would you like your password to be? ").strip()

        players.append([newName, newPassword])

        with open('ScoreSheet.csv', 'a', newline='') as file:
            writer = csv.writer(file)
            writer.writerow([newName, newPassword])

    # if the player has logged in before, ask for their name and password and check if they match
    elif newUser == 'yes':
        verifyName = input(f"Player {i+1}, what is your name? ").strip()
        verifyPassword = input(f"Player {i+1}, what is your password? ").strip()

        # loop through each player's login information and check if there is a match
        match_found = False
        for player in players:
            if player == [verifyName, verifyPassword]:
                print(f"Player {i+1}, you are logged in")
                match_found = True
                break

        # if there is no match, inform the player and ask them to try again
        if not match_found:
            print(f"Player {i+1}, wrong username or password. Please try again.")

# print welcome message with the players' names
if len(players) >= 0:
    print(f"Welcome, {players[0][0]} and {players[1][0]}!")
    access = True
else:
    print("Error: not enough players logged in.")

系统返回结果示例 #

Player 1, have you made a username and password before? yes
Player 1, what is your name? janet
Player 1, what is your password? janet123
Player 1, you are logged in
Player 2, have you made a username and password before? yes
Player 2, what is your name? juno
Player 2, what is your password? juno123
Player 2, you are logged in
Welcome, 'finley' and janet!

测试情况：逻辑与匹配功能正常 #

我已对系统的逻辑和匹配能力进行测试，结果显示匹配功能正常：

测试代码 #

with open('ScoreSheet.csv', 'r') as f:
   reader = csv.reader(f, delimiter=',')
   for row in reader:
       print(f"CSV row: {row}")
       if row == [verifyName, verifyPassword]:
           print(f"You are logged in with username: {verifyName} and password: {verifyPassword}")
           match_found = True
           break

print(f"Input username: {verifyName}")
print(f"Input password: {verifyPassword}")



with open('ScoreSheet.csv', newline='') as csvfile:
    reader = csv.DictReader(csvfile)
    for row in reader:
        print(row['name'], row['password'], row['score'])


with open('ScoreSheet.csv', 'r') as f:
    reader = csv.reader(f, delimiter=',')
    for row in reader:
        print(type(row))  # add this line to check the data type
        if row == [verifyName, verifyPassword]:
            print('You are logged in')
            match_found = True
            break



with open('ScoreSheet.csv', 'r') as f:
    reader = csv.reader(f, delimiter=',')
    for row in reader:
        print(row)  # add this line to check the rows
        if row == [verifyName, verifyPassword]:
            print('You are logged in')
            match_found = True
            break
        else:
            print(f"Row {row} does not match {verifyName} and {verifyPassword}")

测试返回结果 #

CSV row: ['name', 'password', 'score']
CSV row: ["'finley'", " 'fin'", " '10'"]
CSV row: ['janet', 'janet123']
CSV row: ['james', 'james123']
CSV row: ['charlie', 'charlie123']
CSV row: ['amy', 'amy123']
CSV row: ['fred', 'fred123']
CSV row: ['summer', 'summer123']
CSV row: ['nat', 'nat123']
CSV row: ['nathan', 'nathan123']
CSV row: ['elle', 'elle123']
CSV row: ['charles', 'charles123']
CSV row: ['juno', 'juno123']
You are logged in with username: juno and password: juno123
Input username: juno
Input password: juno123
'finley'  'fin'  '10'
janet janet123 None
james james123 None
charlie charlie123 None
amy amy123 None
fred fred123 None
summer summer123 None
nat nat123 None
nathan nathan123 None
elle elle123 None
charles charles123 None
juno juno123 None
sam sam123 None
samuel samuel123 None
Tom Tom123 None
Thomas Thomas123 None
charlie charlie123 None
grace grace123 None
natalie natalie123 None
Dan Dan123 None
Daniel Daniel123 None
nathaniel nathaniel123 None
lisa lisa123 None
joel joel123 None
jake jake123 None
jane jane123 None
james james123 None
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
<class 'list'>
You are logged in
['name', 'password', 'score']
Row ['name', 'password', 'score'] does not match juno and juno123
["'finley'", " 'fin'", " '10'"]
Row ["'finley'", " 'fin'", " '10'"] does not match juno and juno123
['janet', 'janet123']
Row ['janet', 'janet123'] does not match juno and juno123
['james', 'james123']
Row ['james', 'james123'] does not match juno and juno123
['charlie', 'charlie123']
Row ['charlie', 'charlie123'] does not match juno and juno123
['amy', 'amy123']
Row ['amy', 'amy123'] does not match juno and juno123
['fred', 'fred123']
Row ['fred', 'fred123'] does not match juno and juno123
['summer', 'summer123']
Row ['summer', 'summer123'] does not match juno and juno123
['nat', 'nat123']
Row ['nat', 'nat123'] does not match juno and juno123
['nathan', 'nathan123']
Row ['nathan', 'nathan123'] does not match juno and juno123
['elle', 'elle123']
Row ['elle', 'elle123'] does not match juno and juno123
['charles', 'charles123']
Row ['charles', 'charles123'] does not match juno and juno123
['juno', 'juno123']
You are logged in
Here is your card 'finley': Yellow 5
Here is your card janet: Yellow 1

内容的提问来源于stack exchange，提问作者fcorby