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| 54 | ||
| 55 | <H1><A NAME="SECTION008300000000000000000"> | |
| 56 | 6.3 <tt class="module">dircache</tt> -- | |
| 57 | Cached directory listings</A> | |
| 58 | </H1> | |
| 59 | ||
| 60 | <P> | |
| 61 | <A NAME="module-dircache"></A> | |
| 62 | ||
| 63 | <P> | |
| 64 | The <tt class="module">dircache</tt> module defines a function for reading directory listing | |
| 65 | using a cache, and cache invalidation using the <var>mtime</var> of the directory. | |
| 66 | Additionally, it defines a function to annotate directories by appending | |
| 67 | a slash. | |
| 68 | ||
| 69 | <P> | |
| 70 | The <tt class="module">dircache</tt> module defines the following functions: | |
| 71 | ||
| 72 | <P> | |
| 73 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 74 | <td><nobr><b><tt id='l2h-1772' xml:id='l2h-1772' class="function">listdir</tt></b>(</nobr></td> | |
| 75 | <td><var>path</var>)</td></tr></table></dt> | |
| 76 | <dd> | |
| 77 | Return a directory listing of <var>path</var>, as gotten from | |
| 78 | <tt class="function">os.listdir()</tt>. Note that unless <var>path</var> changes, further call | |
| 79 | to <tt class="function">listdir()</tt> will not re-read the directory structure. | |
| 80 | ||
| 81 | <P> | |
| 82 | Note that the list returned should be regarded as read-only. (Perhaps | |
| 83 | a future version should change it to return a tuple?) | |
| 84 | </dl> | |
| 85 | ||
| 86 | <P> | |
| 87 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 88 | <td><nobr><b><tt id='l2h-1773' xml:id='l2h-1773' class="function">opendir</tt></b>(</nobr></td> | |
| 89 | <td><var>path</var>)</td></tr></table></dt> | |
| 90 | <dd> | |
| 91 | Same as <tt class="function">listdir()</tt>. Defined for backwards compatibility. | |
| 92 | </dl> | |
| 93 | ||
| 94 | <P> | |
| 95 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 96 | <td><nobr><b><tt id='l2h-1774' xml:id='l2h-1774' class="function">annotate</tt></b>(</nobr></td> | |
| 97 | <td><var>head, list</var>)</td></tr></table></dt> | |
| 98 | <dd> | |
| 99 | Assume <var>list</var> is a list of paths relative to <var>head</var>, and append, | |
| 100 | in place, a "<tt class="character">/</tt>" to each path which points to a directory. | |
| 101 | </dl> | |
| 102 | ||
| 103 | <P> | |
| 104 | <div class="verbatim"><pre> | |
| 105 | >>> import dircache | |
| 106 | >>> a = dircache.listdir('/') | |
| 107 | >>> a = a[:] # Copy the return value so we can change 'a' | |
| 108 | >>> a | |
| 109 | ['bin', 'boot', 'cdrom', 'dev', 'etc', 'floppy', 'home', 'initrd', 'lib', 'lost+ | |
| 110 | found', 'mnt', 'proc', 'root', 'sbin', 'tmp', 'usr', 'var', 'vmlinuz'] | |
| 111 | >>> dircache.annotate('/', a) | |
| 112 | >>> a | |
| 113 | ['bin/', 'boot/', 'cdrom/', 'dev/', 'etc/', 'floppy/', 'home/', 'initrd/', 'lib/ | |
| 114 | ', 'lost+found/', 'mnt/', 'proc/', 'root/', 'sbin/', 'tmp/', 'usr/', 'var/', 'vm | |
| 115 | linuz'] | |
| 116 | </pre></div> | |
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