Cannot use BatchJob to update labels

[sfontana]

I'm trying to change a campaignLabel using the BatchJob.
Here https://developers.google.com/adwords/api/docs/guides/batch-jobs#supported_operations is says that CampaignLabel is a supported operation.

Unfortunately this

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns0="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="https://adwords.google.com/api/adwords/cm/v201601" xmlns:tns="https://adwords.google.com/api/adwords/cm/v201601" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <SOAP-ENV:Header>
      <tns:RequestHeader>
         <tns:clientCustomerId>XXX-XXX-XXXX</tns:clientCustomerId>
         <tns:developerToken>1234567890</tns:developerToken>
         <tns:userAgent>Webrepublic..</tns:userAgent>
         <tns:validateOnly>false</tns:validateOnly>
         <tns:partialFailure>false</tns:partialFailure>
      </tns:RequestHeader>
   </SOAP-ENV:Header>
   <ns0:Body>
      <ns1:mutateLabel>   <----------------------------------------
         <ns1:operations>
            <ns1:operator>ADD</ns1:operator>
            <ns1:Operation.Type>CampaignLabelOperation</ns1:Operation.Type>
            <ns1:operand>
               <ns1:campaignId>436647188</ns1:campaignId>
               <ns1:labelId>448280348</ns1:labelId>
            </ns1:operand>
         </ns1:operations>
      </ns1:mutateLabel>
   </ns0:Body>
</SOAP-ENV:Envelope>

will fail because https://github.com/googleads/googleads-python-lib/blob/master/googleads/adwords.py#L769
return root.find('{http://schemas.xmlsoap.org/soap/envelope/}Body').find( '%smutate' % self._adwords_namespace)
will only look for mutate and not mutateLabel.

[msaniscalchi]

Thanks for reporting this. It looks like our support for label operations is broken because of this line. We'll push a fix for this in the near future.