10.11. "dircache" --- Cached directory listings
***********************************************

버전 2.6 폐지: The "dircache" module has been removed in Python 3.

The "dircache" module defines a function for reading directory listing
using a cache, and cache invalidation using the *mtime* of the
directory. Additionally, it defines a function to annotate directories
by appending a slash.

The "dircache" module defines the following functions:

dircache.reset()

   Resets the directory cache.

dircache.listdir(path)

   Return a directory listing of *path*, as gotten from
   "os.listdir()". Note that unless *path* changes, further call to
   "listdir()" will not re-read the directory structure.

   Note that the list returned should be regarded as read-only.
   (Perhaps a future version should change it to return a tuple?)

dircache.opendir(path)

   Same as "listdir()". Defined for backwards compatibility.

dircache.annotate(head, list)

   Assume *list* is a list of paths relative to *head*, and append, in
   place, a "'/'" to each path which points to a directory.

   >>> import dircache
   >>> a = dircache.listdir('/')
   >>> a = a[:] # Copy the return value so we can change 'a'
   >>> a
   ['bin', 'boot', 'cdrom', 'dev', 'etc', 'floppy', 'home', 'initrd', 'lib', 'lost+
   found', 'mnt', 'proc', 'root', 'sbin', 'tmp', 'usr', 'var', 'vmlinuz']
   >>> dircache.annotate('/', a)
   >>> a
   ['bin/', 'boot/', 'cdrom/', 'dev/', 'etc/', 'floppy/', 'home/', 'initrd/', 'lib/
   ', 'lost+found/', 'mnt/', 'proc/', 'root/', 'sbin/', 'tmp/', 'usr/', 'var/', 'vm
   linuz']
