For example, suppose sys.prefix and sys.exec_prefix are set to
/usr/local. The Python X.Y library is then installed in
/usr/local/lib/pythonX.Y. Suppose this has
a subdirectory /usr/local/lib/pythonX.Y/site-packages with three
subsubdirectories, foo, bar and spam, and two path
configuration files, foo.pth and bar.pth. Assume
foo.pth contains the following: