My first python appl

seq_usernames=[]
seq_passwords=[]
with open("user_table.txt",'r') as f:
        first_username = f.readline()[9:]
        print(first_username)
        seq_usernames.append(first_username)
        first_password = f.readline()[9:]
        print(first_password)
        seq_passwords.append(first_password)
        second_username = f.readline()[9:]
        print(second_username)
        seq_usernames.append(second_username)
        second_password = f.readline()[9:]
        print(second_password)
        seq_passwords.append(second_password)
f.close()
print(seq_usernames)
print(seq_passwords)
seq_user = dict.fromkeys(seq_usernames,'123456')
print(seq_user)

#用户输入
i = 0
for i in range(3):
    username = input("请输入用户名username=")
    username = username + '\n'
    password = input("请输入密码password=")
    if username in seq_user and password == seq_user.get(username):
        print(seq_user.get(username))
        print("Congrantulation! You're right!")
        break
    else:
        print("Your are wrong,You need test again!")
    i = i + 1

else:
    print("Sorry,You don't have time anymore")