auto save

diy2.py

+i=3
 username="python"
 userpassword="123456"
 while True:
-    name=input("请输入用户名:")
-    word=input("请输入密码:")
-    if username==name and userpassword==word:
-        print("登入成功")
-        break
-    if username!=name:
-        print("用户名错误,请重新输入!")
-        continue
-    if userpassword!=word:
-        print("密码错误,请重新输入!")
+    if i>0:
+        name=input("请输入用户名:")
+        word=input("请输入密码:")
+        i-=1
+        if username==name and userpassword==word:
+            print("登入成功")
+            break
+        if username!=name:
+            print("用户名错误,请重新输入!")
+            print("你还有"+str(i)+"次登入机会")
+            continue
+        if userpassword!=word:
+            print("密码错误,请重新输入!")
+    else:
+        print("账户已被锁定!")
+        exit()
 
 print("欢迎来到贝尔编程")