save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=3
+while True:
+    name = input("请输入用户名:")
+    if name ==username:
+        break
+    else:
+        print('用户名错误，请重新输入')
+while i>0:
+    password = input("请输入密码:")
+    if i==0:
+        print('你的账户已锁定')
+        exit()
+    if password !=userpassword:
+        print('密码错误，请重新输入')
+        i-=1
+        continue
+    if name == username and password == userpassword:
+        print("登录成功!")
+        print("欢迎来到贝尔编程!")
+        break
+    
+