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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def loadDeviceDefinitions(self, urlOfXMLDefinition, timeout=3):
 """Loads the device definitions from a given URL which points to the root XML in the device. This loads the device definitions which is needed in case you like to: * get additional information's about the device like manufacture, device type, etc * get all support service types of this device * use the convenient actions classes part of this library in the actions module :param str urlOfXMLDefinition: the URL to the root XML which sets the device definitions. :param float timeout: the timeout for downloading :raises ValueError: if the XML could not be parsed correctly :raises requests.exceptions.ConnectionError: when the device definitions can not be downloaded :raises requests.exceptions.ConnectTimeout: when download time out .. seealso:: :meth:`~simpletr64.DeviceTR64.loadSCPD`, :meth:`~simpletr64.DeviceTR64.deviceServiceDefinitions`, :meth:`~simpletr64.DeviceTR64.deviceInformations`, :meth:`~simpletr64.DeviceTR64.deviceSCPD`, :meth:`~simpletr64.DeviceTR64.getSCDPURL`, :meth:`~simpletr64.DeviceTR64.getControlURL`, :meth:`~simpletr64.DeviceTR64.getEventSubURL` """


        # setup proxies
        proxies = {}
        if self.__httpsProxy:
            proxies = {"https": self.__httpsProxy}

        if self.__httpProxy:
            proxies = {"http": self.__httpProxy}

        # some devices response differently without a User-Agent
        headers = {"User-Agent": "Mozilla/5.0; SimpleTR64-1"}

        # setup authentication
        auth = None
        if self.__password:
            auth = HTTPDigestAuth(self.__username, self.__password)

        # get the content
        request = requests.get(urlOfXMLDefinition, proxies=proxies, headers=headers, timeout=float(timeout),
                               auth=auth, verify=self.__verify)

        if request.status_code != 200:
            errorStr = DeviceTR64._extractErrorString(request)
            raise ValueError('Could not get CPE definitions "' + urlOfXMLDefinition + '" : ' +
                             str(request.status_code) + ' - ' + request.reason + " -- " + errorStr)

        # parse XML return
        xml = request.text.encode('utf-8')

        return self._loadDeviceDefinitions(urlOfXMLDefinition, xml)