save project

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("真取")
+        break
+    elif name!=username:
+        print("用户名错")
+    elif password!=userpassword:
+        print("密码错")
+
+    print("错")
+print("真取")