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
F. Hand, D. Pecknold, und W. Schnobrich. Structural Research Series No.389. University of Illinois Engineering Experiment Station. College of
Engineering, University of Illinois at Urbana-Champaign, (August 1972)
M. Mikkola, und W. Schnobrich. Structural Research Series No.367. University of Illinois Engineering Experiment Station. College of
Engineering, University of Illinois at Urbana-Champaign, (August 1970)