save project

diy2.py

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