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<title>6.7.1 The dircmp class </title>
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<H2><A NAME="SECTION008710000000000000000"></A><A NAME="dircmp-objects"></A>
<BR>
6.7.1 The <tt class="class">dircmp</tt> class
</H2>

<P>
<tt class="class">dircmp</tt> instances are built using this constructor:

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-1816' xml:id='l2h-1816' class="class">dircmp</tt></b>(</nobr></td>
  <td><var>a, b</var><big>[</big><var>, ignore</var><big>[</big><var>, hide</var><big>]</big><var></var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Construct a new directory comparison object, to compare the
directories <var>a</var> and <var>b</var>. <var>ignore</var> is a list of names to
ignore, and defaults to <code>['RCS', 'CVS', 'tags']</code>. <var>hide</var> is a
list of names to hide, and defaults to <code>[os.curdir, os.pardir]</code>.
</dl>

<P>
The <tt class="class">dircmp</tt> class provides the following methods:

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1817' xml:id='l2h-1817' class="method">report</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
Print (to <code>sys.stdout</code>) a comparison between <var>a</var> and <var>b</var>.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1818' xml:id='l2h-1818' class="method">report_partial_closure</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
Print a comparison between <var>a</var> and <var>b</var> and common immediate
subdirectories.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-1819' xml:id='l2h-1819' class="method">report_full_closure</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
Print a comparison between <var>a</var> and <var>b</var> and common
subdirectories (recursively).
</dl>

<P>
The <tt class="class">dircmp</tt> offers a number of interesting attributes that may
be used to get various bits of information about the directory trees
being compared.

<P>
Note that via <tt class="method">__getattr__()</tt> hooks, all attributes are
computed lazily, so there is no speed penalty if only those
attributes which are lightweight to compute are used.

<P>
<dl><dt><b><tt id='l2h-1820' xml:id='l2h-1820' class="member">left_list</tt></b></dt>
<dd>
Files and subdirectories in <var>a</var>, filtered by <var>hide</var> and
<var>ignore</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1821' xml:id='l2h-1821' class="member">right_list</tt></b></dt>
<dd>
Files and subdirectories in <var>b</var>, filtered by <var>hide</var> and
<var>ignore</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1822' xml:id='l2h-1822' class="member">common</tt></b></dt>
<dd>
Files and subdirectories in both <var>a</var> and <var>b</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1823' xml:id='l2h-1823' class="member">left_only</tt></b></dt>
<dd>
Files and subdirectories only in <var>a</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1824' xml:id='l2h-1824' class="member">right_only</tt></b></dt>
<dd>
Files and subdirectories only in <var>b</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1825' xml:id='l2h-1825' class="member">common_dirs</tt></b></dt>
<dd>
Subdirectories in both <var>a</var> and <var>b</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1826' xml:id='l2h-1826' class="member">common_files</tt></b></dt>
<dd>
Files in both <var>a</var> and <var>b</var>
</dl>

<P>
<dl><dt><b><tt id='l2h-1827' xml:id='l2h-1827' class="member">common_funny</tt></b></dt>
<dd>
Names in both <var>a</var> and <var>b</var>, such that the type differs between
the directories, or names for which <tt class="function">os.stat()</tt> reports an
error.
</dl>

<P>
<dl><dt><b><tt id='l2h-1828' xml:id='l2h-1828' class="member">same_files</tt></b></dt>
<dd>
Files which are identical in both <var>a</var> and <var>b</var>.
</dl>

<P>
<dl><dt><b><tt id='l2h-1829' xml:id='l2h-1829' class="member">diff_files</tt></b></dt>
<dd>
Files which are in both <var>a</var> and <var>b</var>, whose contents differ.
</dl>

<P>
<dl><dt><b><tt id='l2h-1830' xml:id='l2h-1830' class="member">funny_files</tt></b></dt>
<dd>
Files which are in both <var>a</var> and <var>b</var>, but could not be
compared.
</dl>

<P>
<dl><dt><b><tt id='l2h-1831' xml:id='l2h-1831' class="member">subdirs</tt></b></dt>
<dd>
A dictionary mapping names in <tt class="member">common_dirs</tt> to
<tt class="class">dircmp</tt> objects.
</dl>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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