save project

diy2.py

+username = "SB"
+userpassword = "123456"
+while True:
+    name = input("请输入SB名:")
+    if name == username:
+        password = input("请输入SB码:")
+        if password == userpassword:
+            print("SB登录成功!")
+            break
+        else:
+            print("SB码错误,请重新输入")
+    else:
+        print("SB名错误,请重新输入")
+print("欢迎来到SB编程!")
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