save project

diy2.py

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