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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 _deploy_iapp(self, iapp_name, actions, deploying_device):
        '''Deploy iapp to add trusted device

        :param iapp_name: str -- name of iapp
        :param actions: dict -- actions definition of iapp sections
        :param deploying_device: ManagementRoot object -- device where the
                                 iapp will be created
        '''

        tmpl = deploying_device.tm.sys.application.templates.template
        serv = deploying_device.tm.sys.application.services.service
        tmpl.create(name=iapp_name, partition=self.partition, actions=actions)
        pollster(deploying_device.tm.sys.application.templates.template.load)(
            name=iapp_name, partition=self.partition
        )
        serv.create(
            name=iapp_name,
            partition=self.partition,
            template='/%s/%s' % (self.partition, iapp_name)
        )