如何解决“为占位符张量提供值”错误？

I'm brand new to Tensorflow and while following through a book I have found that their sample data is too verbose for me to follow what Tensorflow is doing. That being the case I have made my own ultra small csv file instead. After working through several errors I am at the end of my script and can't seem to work through this final error:I'm brand new to Tensorflow and while following