entr (http://entrproject.org/) provides a more friendly interface to inotify (and also supports *BSD & Mac OS X).
It makes it very easy to specify multiple files to watch (limited only by ulimit -n), takes the hassle out of dealing with files being replaced, and requires less bash syntax:
$ find . -name '*.py' | entr ./myfile.py
S. Sapkota, A. Shakya, and B. Joshi. Proceedings of the 26th International Conference of the ORIENTAL- COCOSDA (O-COCOSDA 2023), page 1-6. IEEE, (December 2023)