我在做接口測試，用什么函數才能輸出服務器返回值的個數？web_service_call( "StepName=QueryAddress_102","SOAPMethod=MTProxyServiceImplService|MTProxyServiceImplPort|QueryAddress","ResponseParam=response","Service=MTProxyServiceImplService","ExpectedResponse=SoapResult","Snapshot=t1436164836.inf",BEGIN_ARGUMENTS,"arg0=2101","arg1=10","arg2=路",END_ARGUMENTS,BEGIN_RESULT,"return=Param_return",END_RESULT,LAST);就是想把Param_return的個數輸出來