save project

diy1.py

+i=3
 username = "python"    # 保存在服务器数据库中的用户账号（正确的账号）
 userpassword = "123456"
 while true:
-    name=input("请输入用户名")
-    password=input("请输入密码")
-    if name ==usename and password ==userpassword 
-        print("登陆成功")
-        break
-    if name !=username:
-        print("用户名不存在")
-        continue
-    if password != userpassword:
-        print("密码错误")#
+    if i>0:
+        name=input("请输入用户名")
+        password=input("请输入密码")
+        i-=1
+        if name ==usename and password ==userpassword 
+            print("登陆成功")
+            break
+        if name !=username:
+            print("用户名不存在")
+            continue
+        if password != userpassword:
+            print("密码错误")#
+    else:
+        print("账号已锁定")
+        exit()
 print("欢迎")