XML : How to parse tiered XML String

I have an xml string that I need to parse in python that looks like this:

   <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">       <s:Body>           <PostLoadsResponse xmlns="http://webservices.truckstop.com/v11">               <PostLoadsResult xmlns:a="http://schemas.datacontract.org/2004/07/WebServices.Objects" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">                   <Errors xmlns="http://schemas.datacontract.org/2004/07/WebServices">                      <Error>                           <ErrorMessage>Invalid Location</ErrorMessage>                      </Error>                  </Errors>              </PostLoadsResult>          </PostLoadsResponse>      </s:Body>  </s:Envelope>'    

I'm having trouble using xmltree to get to the error message of this tree without something like:

  import xml.etree.ElementTree as ET  ET.fromstring(text).findall('{http://schemas.xmlsoap.org/soap/envelope/}Body')[0].getchildren()[0].getchildren()[0].getchildren()