Creates a new network

def create_network(self, name, admin_state_up=True, router_ext=None, network_type=None, physical_network=None, segmentation_id=None, shared=None, vlan_transparent=None):
        '''
        Creates a new network
        '''
        body = {'name': name,
                'admin_state_up': admin_state_up}
        if router_ext:
            body['router:external'] = router_ext
        if network_type:
            body['provider:network_type'] = network_type
        if physical_network:
            body['provider:physical_network'] = physical_network
        if segmentation_id:
            body['provider:segmentation_id'] = segmentation_id
        if shared:
            body['shared'] = shared
        if vlan_transparent:
            body['vlan_transparent'] = vlan_transparent
        return self.network_conn.create_network(body={'network': body})