How to use the pywps.config.get_config_value function in pywps

doc = WPS.Capabilities()

        doc.attrib['service'] = 'WPS'
        doc.attrib['version'] = '1.0.0'
        doc.attrib['{http://www.w3.org/XML/1998/namespace}lang'] = 'en-CA'
        doc.attrib['{http://www.w3.org/2001/XMLSchema-instance}schemaLocation'] = 'http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsDescribeProcess_response.xsd'
        # TODO: check Table 7 in OGC 05-007r7
        doc.attrib['updateSequence'] = '1'

        # Service Identification
        service_ident_doc = OWS.ServiceIdentification(
            OWS.Title(config.get_config_value('wps', 'title'))
        )

        if config.get_config_value('wps', 'abstract'):
            service_ident_doc.append(OWS.Abstract(config.get_config_value('wps', 'abstract')))

        if config.get_config_value('wps', 'keywords'):
            keywords_doc = OWS.Keywords()
            for k in config.get_config_value('wps', 'keywords').split(','):
                if k:
                    keywords_doc.append(OWS.Keyword(k))
            service_ident_doc.append(keywords_doc)

        service_ident_doc.append(OWS.ServiceType('WPS'))

        for v in config.get_config_value('wps', 'version').split(','):
            service_ident_doc.append(OWS.ServiceTypeVersion(v))

        service_ident_doc.append(OWS.Fees(config.get_config_value('wps', 'fees')))

        for con in config.get_config_value('wps', 'constraints').split(','):

service_prov_doc = OWS.ServiceProvider(OWS.ProviderName(config.get_config_value('provider', 'providerName')))

        if config.get_config_value('provider', 'providerSite'):
            service_prov_doc.append(OWS.ProviderSite(
                {'{http://www.w3.org/1999/xlink}href': config.get_config_value('provider', 'providerSite')})
            )

        # Service Contact
        service_contact_doc = OWS.ServiceContact()

        # Add Contact information only if a name is set
        if config.get_config_value('provider', 'individualName'):
            service_contact_doc.append(OWS.IndividualName(config.get_config_value('provider', 'individualName')))
            if config.get_config_value('provider', 'positionName'):
                service_contact_doc.append(OWS.PositionName(config.get_config_value('provider', 'positionName')))
            if config.get_config_value('provider', 'role'):
                service_contact_doc.append(OWS.Role(config.get_config_value('provider', 'role')))

            contact_info_doc = OWS.ContactInfo()

            phone_doc = OWS.Phone()
            if config.get_config_value('provider', 'phoneVoice'):
                phone_doc.append(OWS.Voice(config.get_config_value('provider', 'phoneVoice')))
            if config.get_config_value('provider', 'phoneFacsimile'):
                phone_doc.append(OWS.Facsimile(config.get_config_value('provider', 'phoneFacsimile')))
            # Add Phone if not empty
            if len(phone_doc):
                contact_info_doc.append(phone_doc)

            address_doc = OWS.Address()
            if config.get_config_value('provider', 'deliveryPoint'):
                address_doc.append(OWS.DeliveryPoint(config.get_config_value('provider', 'deliveryPoint')))

if config.get_config_value('provider', 'country'):
                address_doc.append(OWS.Country(config.get_config_value('provider', 'country')))
            if config.get_config_value('provider', 'electronicalMailAddress'):
                address_doc.append(
                    OWS.ElectronicMailAddress(config.get_config_value('provider', 'electronicalMailAddress'))
                )
            # Add Address if not empty
            if len(address_doc):
                contact_info_doc.append(address_doc)

            if config.get_config_value('provider', 'onlineResource'):
                contact_info_doc.append(OWS.OnlineResource(
                    {'{http://www.w3.org/1999/xlink}href': config.get_config_value('provider', 'onlineResource')})
                )
            if config.get_config_value('provider', 'hoursOfService'):
                contact_info_doc.append(OWS.HoursOfService(config.get_config_value('provider', 'hoursOfService')))
            if config.get_config_value('provider', 'contactInstructions'):
                contact_info_doc.append(OWS.ContactInstructions(config.get_config_value('provider', 'contactInstructions')))

            # Add Contact information if not empty
            if len(contact_info_doc):
                service_contact_doc.append(contact_info_doc)

        # Add Service Contact only if ProviderName and PositionName are set
        if len(service_contact_doc):
            service_prov_doc.append(service_contact_doc)

        doc.append(service_prov_doc)

        # Operations Metadata
        operations_metadata_doc = OWS.OperationsMetadata(
            OWS.Operation(

phone_doc = OWS.Phone()
            if config.get_config_value('provider', 'phoneVoice'):
                phone_doc.append(OWS.Voice(config.get_config_value('provider', 'phoneVoice')))
            if config.get_config_value('provider', 'phoneFacsimile'):
                phone_doc.append(OWS.Facsimile(config.get_config_value('provider', 'phoneFacsimile')))
            # Add Phone if not empty
            if len(phone_doc):
                contact_info_doc.append(phone_doc)

            address_doc = OWS.Address()
            if config.get_config_value('provider', 'deliveryPoint'):
                address_doc.append(OWS.DeliveryPoint(config.get_config_value('provider', 'deliveryPoint')))
            if config.get_config_value('provider', 'city'):
                address_doc.append(OWS.City(config.get_config_value('provider', 'city')))
            if config.get_config_value('provider', 'postalCode'):
                address_doc.append(OWS.PostalCode(config.get_config_value('provider', 'postalCode')))
            if config.get_config_value('provider', 'country'):
                address_doc.append(OWS.Country(config.get_config_value('provider', 'country')))
            if config.get_config_value('provider', 'electronicalMailAddress'):
                address_doc.append(
                    OWS.ElectronicMailAddress(config.get_config_value('provider', 'electronicalMailAddress'))
                )
            # Add Address if not empty
            if len(address_doc):
                contact_info_doc.append(address_doc)

            if config.get_config_value('provider', 'onlineResource'):
                contact_info_doc.append(OWS.OnlineResource(
                    {'{http://www.w3.org/1999/xlink}href': config.get_config_value('provider', 'onlineResource')})
                )
            if config.get_config_value('provider', 'hoursOfService'):
                contact_info_doc.append(OWS.HoursOfService(config.get_config_value('provider', 'hoursOfService')))

phone_doc = OWS.Phone()
            if config.get_config_value('provider', 'phoneVoice'):
                phone_doc.append(OWS.Voice(config.get_config_value('provider', 'phoneVoice')))
            if config.get_config_value('provider', 'phoneFacsimile'):
                phone_doc.append(OWS.Facsimile(config.get_config_value('provider', 'phoneFacsimile')))
            # Add Phone if not empty
            if len(phone_doc):
                contact_info_doc.append(phone_doc)

            address_doc = OWS.Address()
            if config.get_config_value('provider', 'deliveryPoint'):
                address_doc.append(OWS.DeliveryPoint(config.get_config_value('provider', 'deliveryPoint')))
            if config.get_config_value('provider', 'city'):
                address_doc.append(OWS.City(config.get_config_value('provider', 'city')))
            if config.get_config_value('provider', 'postalCode'):
                address_doc.append(OWS.PostalCode(config.get_config_value('provider', 'postalCode')))
            if config.get_config_value('provider', 'country'):
                address_doc.append(OWS.Country(config.get_config_value('provider', 'country')))
            if config.get_config_value('provider', 'electronicalMailAddress'):
                address_doc.append(
                    OWS.ElectronicMailAddress(config.get_config_value('provider', 'electronicalMailAddress'))
                )
            # Add Address if not empty
            if len(address_doc):
                contact_info_doc.append(address_doc)

            if config.get_config_value('provider', 'onlineResource'):
                contact_info_doc.append(OWS.OnlineResource(
                    {'{http://www.w3.org/1999/xlink}href': config.get_config_value('provider', 'onlineResource')})
                )
            if config.get_config_value('provider', 'hoursOfService'):

if config.get_config_value('provider', 'phoneFacsimile'):
                phone_doc.append(OWS.Facsimile(config.get_config_value('provider', 'phoneFacsimile')))
            # Add Phone if not empty
            if len(phone_doc):
                contact_info_doc.append(phone_doc)

            address_doc = OWS.Address()
            if config.get_config_value('provider', 'deliveryPoint'):
                address_doc.append(OWS.DeliveryPoint(config.get_config_value('provider', 'deliveryPoint')))
            if config.get_config_value('provider', 'city'):
                address_doc.append(OWS.City(config.get_config_value('provider', 'city')))
            if config.get_config_value('provider', 'postalCode'):
                address_doc.append(OWS.PostalCode(config.get_config_value('provider', 'postalCode')))
            if config.get_config_value('provider', 'country'):
                address_doc.append(OWS.Country(config.get_config_value('provider', 'country')))
            if config.get_config_value('provider', 'electronicalMailAddress'):
                address_doc.append(
                    OWS.ElectronicMailAddress(config.get_config_value('provider', 'electronicalMailAddress'))
                )
            # Add Address if not empty
            if len(address_doc):
                contact_info_doc.append(address_doc)

            if config.get_config_value('provider', 'onlineResource'):
                contact_info_doc.append(OWS.OnlineResource(
                    {'{http://www.w3.org/1999/xlink}href': config.get_config_value('provider', 'onlineResource')})
                )
            if config.get_config_value('provider', 'hoursOfService'):
                contact_info_doc.append(OWS.HoursOfService(config.get_config_value('provider', 'hoursOfService')))
            if config.get_config_value('provider', 'contactInstructions'):
                contact_info_doc.append(OWS.ContactInstructions(config.get_config_value('provider', 'contactInstructions')))

# Service Contact
        service_contact_doc = OWS.ServiceContact()

        # Add Contact information only if a name is set
        if config.get_config_value('provider', 'individualName'):
            service_contact_doc.append(OWS.IndividualName(config.get_config_value('provider', 'individualName')))
            if config.get_config_value('provider', 'positionName'):
                service_contact_doc.append(OWS.PositionName(config.get_config_value('provider', 'positionName')))
            if config.get_config_value('provider', 'role'):
                service_contact_doc.append(OWS.Role(config.get_config_value('provider', 'role')))

            contact_info_doc = OWS.ContactInfo()

            phone_doc = OWS.Phone()
            if config.get_config_value('provider', 'phoneVoice'):
                phone_doc.append(OWS.Voice(config.get_config_value('provider', 'phoneVoice')))
            if config.get_config_value('provider', 'phoneFacsimile'):
                phone_doc.append(OWS.Facsimile(config.get_config_value('provider', 'phoneFacsimile')))
            # Add Phone if not empty
            if len(phone_doc):
                contact_info_doc.append(phone_doc)

            address_doc = OWS.Address()
            if config.get_config_value('provider', 'deliveryPoint'):
                address_doc.append(OWS.DeliveryPoint(config.get_config_value('provider', 'deliveryPoint')))
            if config.get_config_value('provider', 'city'):
                address_doc.append(OWS.City(config.get_config_value('provider', 'city')))
            if config.get_config_value('provider', 'postalCode'):
                address_doc.append(OWS.PostalCode(config.get_config_value('provider', 'postalCode')))
            if config.get_config_value('provider', 'country'):
                address_doc.append(OWS.Country(config.get_config_value('provider', 'country')))

address_doc.append(OWS.PostalCode(config.get_config_value('provider', 'postalCode')))
            if config.get_config_value('provider', 'country'):
                address_doc.append(OWS.Country(config.get_config_value('provider', 'country')))
            if config.get_config_value('provider', 'electronicalMailAddress'):
                address_doc.append(
                    OWS.ElectronicMailAddress(config.get_config_value('provider', 'electronicalMailAddress'))
                )
            # Add Address if not empty
            if len(address_doc):
                contact_info_doc.append(address_doc)

            if config.get_config_value('provider', 'onlineResource'):
                contact_info_doc.append(OWS.OnlineResource(
                    {'{http://www.w3.org/1999/xlink}href': config.get_config_value('provider', 'onlineResource')})
                )
            if config.get_config_value('provider', 'hoursOfService'):
                contact_info_doc.append(OWS.HoursOfService(config.get_config_value('provider', 'hoursOfService')))
            if config.get_config_value('provider', 'contactInstructions'):
                contact_info_doc.append(OWS.ContactInstructions(config.get_config_value('provider', 'contactInstructions')))

            # Add Contact information if not empty
            if len(contact_info_doc):
                service_contact_doc.append(contact_info_doc)

        # Add Service Contact only if ProviderName and PositionName are set
        if len(service_contact_doc):
            service_prov_doc.append(service_contact_doc)

        doc.append(service_prov_doc)

        # Operations Metadata
        operations_metadata_doc = OWS.OperationsMetadata(