\section{\module{dircache} ---         Cached directory listings} \declaremodule{standard}{dircache}\sectionauthor{Moshe Zadka}{moshez@zadka.site.co.il}\modulesynopsis{Return directory listing, with cache mechanism.} The \module{dircache} module defines a function for reading directory listingusing a cache, and cache invalidation using the \var{mtime} of the directory.Additionally, it defines a function to annotate directories by appendinga slash. The \module{dircache} module defines the following functions: \begin{funcdesc}{reset}{}Resets the directory cache.\end{funcdesc} \begin{funcdesc}{listdir}{path}Return a directory listing of \var{path}, as gotten from\function{os.listdir()}. Note that unless \var{path} changes, further callto \function{listdir()} will not re-read the directory structure. Note that the list returned should be regarded as read-only. (Perhapsa future version should change it to return a tuple?)\end{funcdesc} \begin{funcdesc}{opendir}{path}Same as \function{listdir()}. Defined for backwards compatibility.\end{funcdesc} \begin{funcdesc}{annotate}{head, list}Assume \var{list} is a list of paths relative to \var{head}, and append,in place, a \character{/} to each path which points to a directory.\end{funcdesc} \begin{verbatim}>>> 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/', 'vmlinuz']\end{verbatim}