auto save

diy2.py

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