The current version of the Deep Learning Parsing example Notebook lacks theinplace=True parameter on thesort method call to the Layout instance in the left Interval. The master version's large block of image data shows these TextBlock's ids in top-down sequential order. Running the Notebook as written, however, will refresh the Notebook page image with out of sequence ids due to the default of theinplace parameter being False. The current master Notebook will produce the following image post-refresh:

For instructional clarity, this version also casts theright_blocks variable as aLayout instance initialized with theTextBlock instances not in the leftInterval and withinplace=True to ensure the intendedsort sequencing of block ids.

A few non-essential additions to the source comments are added relative to the changes described.

Please note: At 70 years of age, this is my first PR to a public repository. I started my career with no CompSci or engineering experience as a Control Data PLATO developer. I then spent the bulk of my career in Programmer Nirvana as a Smalltalk developer on small teams with brilliant engineers who did all the necessary heavy lifting of integration and testing while I got to explore the nether regions of proof-of-concept ideas. So this is truly a learning experience for me. Any pointers or advice to make this PR useful and acceptable will be greatly appreciated.