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
-    if name != username:
-        print("账号错误请重新输入")
-        continue
-    if userpassword != password:
-        print("密码错误请重新输入")
-    if 1>=0:
-       print ("你的账号密码已锁定")
-       exit
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name != username:
+            print("账号错误请重新输入")
+            continue
+        if userpassword != password:
+            print("密码错误请重新输入")
+    else:
+       print ("你的账号已死掉")
+       exit()
 print("欢迎来到贝尔编程!")