save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
-    name = input("请输入用户名:")
-    if  name == username:
-        password = input("请输入密码:")
-        if password == userpassword:
-            print("欢迎来到贝尔编程!")
+    i-=1
+    if i==0
+        name = input("请输入用户名:")
+        if  name == username:
+            password = input("请输入密码:")
+            if password == userpassword:
+                print("欢迎来到贝尔编程!")
+            else:
+                print("用密码错误!请重新输入")
         else:
         else:
-            print("用密码错误!请重新输入")
+            print("用户名错误!请重新输入")
     else:
     else:
-        print("用户名错误!请重新输入")
-   
-    if password != userpassword:
-        print("密码错误!请重新输入")
-        continue 
-    if name == username and password == userpassword:
-        break
+        print("连续3次")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file