save project

diy1.py

-username = "python"   
-userpassword = "123456"    
+i=5
+username = "qazxcv"   
+userpassword = "102938"    
 while True:
-    zh=input("请输入您的账号:")
-    mm=input("请输入您的密码:")
-    if zh==username and mm==userpassword:
-        print("登陆成功!")
-        break
-    elif zh!=username:
-        print("账号不存在!请重新输入!")
-    else :
-        print("密码输入有误!请重新输入!")
+    if i>0:
+        zh=input("请输入您的账号:")
+        mm=input("请输入您的密码:")
+        i-=1
+        if zh==username and mm==userpassword:
+            print("登陆成功!")
+            break
+        if zh!=username:
+            print("账号不存在!请重新输入!")
+            continue
+        if mm!=userpassword:
+            print("密码输入有误!请重新输入!")
+    else:
+        print("您的账号已被锁定,好自为之!!!")
+        exit()
 print("欢迎来到贝尔编程!!!")
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