save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
-name = input("请输入用户名:")
-password = input("请输入密码:")
-
+a=3
 while True:
 while True:
-    while name!=username:
-       print("用户名错误!请重新输入")
-       name = input("请输入用户名:")
-    while password == userpassword:
-        print("用密码错误!请重新输入")
+    if a>0:
+        name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
-    if name==username and password ==userpassword:
-        print("登录成功!")
-        break        
+        a-=1
+        if name!=username:           
+            print("用户名错误!请重新输入")
+            continue
+        if password!= userpassword:
+            print("用密码错误!请重新输入")
+            continue
+        if name==username and password ==userpassword:
+            print("登录成功!")
+            break
+    else:
+        print("用户已锁定") 
+        exit()   
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file