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<H1><A NAME="SECTION0091000000000000000000">
7.10 <tt class="module">dumbdbm</tt> --
Portable DBM implementation</A>
</H1>
<P>
<P>
A simple and slow database implemented entirely in Python. This
should only be used when no other DBM-style database is available.
<P>
<dl><dt><b><a name='l2h-1712'><tt class='function'>open</tt></a></b> (<var>filename</var><big>[</big><var>, flag</var><big>[</big><var>, mode</var><big>]</big><big>]</big>)
<dd>
Open the database file <var>filename</var> and return a corresponding object.
The optional <var>flag</var> argument can be
<code>'r'</code> to open an existing database for reading only,
<code>'w'</code> to open an existing database for reading and writing,
<code>'c'</code> to create the database if it doesn't exist, or
<code>'n'</code>, which will always create a new empty database. If not
specified, the default value is <code>'r'</code>.
<P>
The optional <var>mode</var> argument is the Unix mode of the file, used
only when the database has to be created. It defaults to octal
<code>0666</code> (and will be modified by the prevailing umask).
</dl>
<P>
<dl><dt><b><a name='l2h-1713'><tt class='exception'>error</tt></a></b>
<dd>
Raised for errors not reported as <tt class="exception">KeyError</tt> errors.
</dl>
<P>
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<p class='heading'><b>See Also:</b></p>
<dl compact class="seemodule">
<dt>Module <b><tt class='module'><a href="module-anydbm.html" tppabs="http://www.python.org/doc/current/lib/module-anydbm.html">anydbm</a></tt>:</b>
<dd>Generic interface to <code>dbm</code>-style databases.
</dl>
<dl compact class="seemodule">
<dt>Module <b><tt class='module'><a href="module-whichdb.html" tppabs="http://www.python.org/doc/current/lib/module-whichdb.html">whichdb</a></tt>:</b>
<dd>Utility module used to determine the type of an
existing database.
</dl>
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