ValueError:无法为张量u' placeholder_1:0 '(有形状)提供形状(50)的值。,10)

I'm a new guy in tensorflow,and I'm trying an experiment with my own .tfrecords files.Now I get something wrong in my code and I don't know what happend.Does anybody tell me how can I solve this problem I'm a new guy in tensorflow,and I'm trying an e