Hi Goeff
I very much agree that fastai library goes through frequent updates, and the documentation is something which is still being worked on. I was initially learning from ver2 of the course, and even that left me confused.
For your specific issue, try ‘TextDataBunch.from_csv(path, ‘texts.csv’)’, where path is where your text file is located, and texts.csv is the csv file with text. TextDataBunch does tokenization and numericalization behind the scenes.