$ curl "http://localhost/cgi-bin/wps/wps.py?request=execute&identifier=justadd&service=WPS&version=0.4.0&DataInputs=value,250"
<?xml version="1.0" ?>
<ExecuteResponse version="0.4.0" xmlns="http://www.opengeospatial.net/wps" xmlns:ows="http://www.opengeospatial.net/ows" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengeospatial.net/wps http://www.bnhelp.cz/schema/wps/0.4.0/wpsExecute.xsd">
        <ows:Identifier>
                justadd
        </ows:Identifier>
        <Status>
                <ProcessFailed>
                        <ows:ExceptionReport verion="1.0">
                                <ows:Exception exceptionCode="0">
                                        <ows:ExceptionText>
                                                'module' object has no attribute 'pwd'
                                        </ows:ExceptionText>
                                </ows:Exception>
                        </ows:ExceptionReport>
                </ProcessFailed>
        </Status>
</ExecuteResponse>