save project

diy1.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 username==name and userpassword==password:
-        print("登录成功！")
-        break
-    if username!=name:
-        print("用户名不存在，请重新输入！")
-        continue
-    if userpassword!=password:
-        print("密码输入有误，请重新输入！")
+while True:
+    if i>0:
+        name=input("请输入用户名：")
+        password=input("请输入密码：")
+        i-=1
+        if username==name and userpassword==password:
+            print("登录成功！")
+            break
+        if username!=name:
+            print("用户名不存在，请重新输入！")
+            continue
+        if userpassword!=password:
+            print("密码输入有误，请重新输入！")
+    else:
+        print("账号被锁定")
+        exit()
 print("欢迎来到贝尔编程！")