save project

diy1.py

+username = "python"    
+userpassword = "123456" 
+while True:   
+    a=input("输入账号")
+    z=input("输入密码")
+    if a==username and z==userpassword:
+        print("登陆成功")
+        break
+    print("错")
+print("登陆成功")
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