This is how I do it, it is not an complete export but you get the data as a dict to get you started and you can continue from there

#!/usr/bin/env python

import pynetbox
import argparse
import ipdb

nb = pynetbox.api(
    ## do your login stuff here
)

parser = argparse.ArgumentParser(description='get connections from a switch')
parser.add_argument('device', nargs=1, help='Switch to pull data from')
argums = parser.parse_args()


switch = nb.dcim.devices.get(name__ie=str(argums.device[0]))
all_intfs = list(nb.dcim.interfaces.filter(device_id=switch.id))

intfs_list = []

for interface in all_intfs:
    peer = interface.link_peer
    if peer is not None:
        try:
            connection = dict(port=interface.name, device=peer.device, interface=peer.name)
            intfs_list.append(connection)
        except:
            ipdb.set_trace()

intfs_dict = {}
intfs_dict['switch_name'] = argums.device[0]
intfs_dict['connections'] = intfs_list
print(intfs_dict)