<revnumber>3.2-0</revnumber>

				<revnumber>3.2-1</revnumber>

				<date>19th of November 2013</date>

				<date>17th of March 2014</date>

				Two functions <function>handler_set()</function> and <function>handler_unset()</function> can be used to set and unset variables.

				The function <function>ucr_update()</function> should be used to set and unset variables.

from univention.config_registry import handler_set, handler_unset

from univention.config_registry.handler import ucr_update

handler_set([

ucr_update(ucr, {

	'foo=bar',

	'foo': 'bar',

	'baz=42',

	'baz': '42',

	])

	'bar': None,

handler_unset(['foo', 'bar'])

	})

				As <function>handler_set()</function> and <function>handler_unset()</function> don't automatically update any instance of <classname>ConfigRegistry</classname>, the <methodname>load()</methodname> method has to be called manually afterwards to reflect the updated values.

				The function <function>ucr_update()</function> requires an instance of <classname>ConfigRegistry</classname> as its first argument.

				The method is guaranteed to be atomic and uses file locking internally to prevent race conditions.

			</para>

			<para>

				The second argument must be a Python dictionary mapping <acronym>UCR</acronym> variable names to their new value.

				The value must be either a string or <constant>None</constant>, which is used to unset the variable.