diy2.py

i=3
username="1"
userpassword="1234"
while True:
    if i>0:
        name=input("请输入名字")
        password=input("请输入密码")
        i-=1
        if username==name and userpassword==password:
            print("登陆成功")
            break
        if username!=name:
            print("名字错误")
            print("你还剩"+str(i)+"机会")
            continue
        if userpassword!=password:
            print("密码错误")
            print("你还剩"+str(i)+"机会")
    else:
        print("账号已锁定")
        exit()
print("欢迎来到贝尔编程")