auto save

diy1.py

+i=3
 usernema = "sb"
 userpassword = "24"
 while True:
-    nema = input("请输入用户名")
-    password = input("请输入密码")
-    if nema == usernema and password == userpassword:
-        print("登录成功")
-        break
-    if nema != usernema:
-        print("用户名错误！") 
-        continue
-    if password != userpassword:
-        print("密码错误！")
+    if i>0
+        nema = input("请输入用户名")
+        password = input("请输入密码")
+        i-=1
+        if nema == usernema and password == userpassword:
+            print("登录成功")
+            break
+        if nema != usernema:
+            print("用户名错误！") 
+            continue
+        if password != userpassword:
+            print("密码错误！")
 print("欢迎来到贝傻逼编程！")  
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