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<title>7.11 dbhash -- DBM-style interface to the BSD database library
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<H1><A NAME=
"SECTION0091100000000000000000">
7.11 <tt class=
"module">dbhash
</tt> --
DBM-style interface to the BSD database library
</A>
<A NAME=
"module-dbhash"></A>
<p class=
"availability">Availability:
<span
class=
"platform">Unix, Windows
</span>.
</p>
The
<tt class=
"module">dbhash
</tt> module provides a function to open databases using
the BSD
<code>db
</code> library. This module mirrors the interface of the
other Python database modules that provide access to DBM-style
databases. The
<tt class=
"module"><a href=
"module-bsddb.html">bsddb
</a></tt><a id='l2h-
2788' xml:id='l2h-
2788'
></a> module is required
to use
<tt class=
"module">dbhash
</tt>.
This module provides an exception and a function:
<dl><dt><b><span class=
"typelabel">exception
</span> <tt id='l2h-
2786' xml:id='l2h-
2786'
class=
"exception">error
</tt></b></dt>
Exception raised on database errors other than
<tt class=
"exception">KeyError
</tt>. It is a synonym for
<tt class=
"exception">bsddb.error
</tt>.
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline">
<td><nobr><b><tt id='l2h-
2787' xml:id='l2h-
2787'
class=
"function">open
</tt></b>(
</nobr></td>
<td><var>path
</var><big>[
</big><var>, flag
</var><big>[
</big><var>, mode
</var><big>]
</big><var></var><big>]
</big><var></var>)
</td></tr></table></dt>
Open a
<code>db
</code> database and return the database object. The
<var>path
</var> argument is the name of the database file.
The
<var>flag
</var> argument can be
<code>'r'
</code> (the default),
<code>'w'
</code>,
<code>'c'
</code> (which creates the database if it doesn't exist), or
<code>'n'
</code> (which always creates a new empty database).
For platforms on which the BSD
<code>db
</code> library supports locking,
an
"<tt class="character
">l</tt>" can be appended to indicate that locking should be
The optional
<var>mode
</var> parameter is used to indicate the
<span class=
"Unix">Unix
</span>
permission bits that should be set if a new database must be
created; this will be masked by the current umask value for the
<p class=
"heading">See Also:
</p>
<dl compact=
"compact" class=
"seemodule">
<dt>Module
<b><tt class=
"module"><a href=
"module-anydbm.html">anydbm
</a></tt>:
</b>
<dd>Generic interface to
<code>dbm
</code>-style databases.
<dl compact=
"compact" class=
"seemodule">
<dt>Module
<b><tt class=
"module"><a href=
"module-bsddb.html">bsddb
</a></tt>:
</b>
<dd>Lower-level interface to the BSD
<code>db
</code> library.
<dl compact=
"compact" class=
"seemodule">
<dt>Module
<b><tt class=
"module"><a href=
"module-whichdb.html">whichdb
</a></tt>:
</b>
<dd>Utility module used to determine the type of an
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<A NAME=
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<LI><A href=
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</a>
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<span class=
"release-info">Release
2.4.2, documentation updated on
28 September
2005.
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