How to build a body like this use SOAPPy?

repeat arrWords

<soapenv:Body>
<v1:WordsRequest>
<arrWords>
<Name>aa</Name>
<Num>11</Num>
</arrWords>
<arrWords>
<Name>bb</Name>
<Num>22</Num>
</arrWords>
<intActionId>99</intActionId>
</v1:WordsRequest>
</soapenv:Body>

I try like this,but fail:
WordsRequest(arrWords=[{'Name:u'aa','Num':u'11'},
{'Name:u'bb','Num':u'22'}],intActionId=99)

WordsRequest(arrWords={'Name:u'aa','Num':u'11'},arrWords={'Name:u'bb','Num'­:u'22'},intActionId=99)
.