如何比较从python到csv的行？

Question

我试图创建一个程序，允许用户使用现有的csv文件包含列出的信息登录。如何让程序读取文件以找到存储在里面的用户名和密码？下面是代码，我试图运行：

login = input("To sign in type 1. To register a new account type 2: ") 
if login == "1": 
    log_username = True 
    while log_username == True: 
     user = input("Username: ") 
     user_password = input("Password: ") 
     saved_users = open(user+".csv","r") 
     for line1 in saved_users: 
      line1.split(",") 
      for line2 in saved_users: 
       line2.split(",") 
       if user == saved_users: 
        if user_password == saved_users: 
          print("Login successful...") 
        else: 
         print("Incorrect password") 
         log_username == False 
       else: 
        print("Incorrect username, please try again.") 
        log_username == False 

Example of csv

Answer 1

这应该为你工作，然后（注意，这意味着没有重复的用户名）：

import csv 
import re 

user = input("Username: ") 
user_password = input("Password: ") 

with open('test.csv', 'r') as saved_users: 
    reader = csv.reader(saved_users) 
    for line in list(reader)[1:]: # I start at 1 to skip the column labels 
     line = [re.sub('[\[\]\']', '', item) for item in line] # This cleans up the brackets and quotes from the csv file 
     if line[0] == user and line[1] == user_password: 
      print("Login successful...") 
      break 
    else: 
     print("Incorrect password")