Hey! I'm the writer of these tools and was kind of surprised to run into it here, since I have not posted about this before — the submitter must have been an adventurous PyPI visitor ;)

This particular tool was mostly written to replace all the ad-hoc aliases and symlinks with something that could be easily maintained and brought to other commands (eg. cdbm, lsbm, mvbm, cpbm, etc.). To speed things up some more there's also tab completion and prefix matching, which is pretty convenient IMO.