save project

diy2.py

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