a TensorFlow Reader is used to read TFRecord files directly into the graph. To create a new TFReader you should inherit from the general TFReader class defined in tfreader.py and overwrite the abstract methods. You should then add it to the factory method in tfreader_factory.py. It is also very helpful to create a default configuration in the defaults directory. The name of the file should be the name of the class in lower case with the .cfg extension.