save project

diy2.py

+username = "python"
+userpassword = "123456"
+while True
+    name =input("")
+    password=input("")
+    if username==name and password==userpassword:
+       print("密码")  
+       break
+    if name != username:
+       print("用户名不存在,请重新输入")   
+    if password != userpassword
+print("欢迎来到贝尔编程!")
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