extract_datawrapper_topojson.py

import urllib
import json
file_url  = 'https://api.datawrapper.de/v3/basemaps/rome-zip'
file_json = "rome.json"
file_output = "rome.topojson"
urllib.request.urlretrieve(file_url ,file_json) 
with open(file_json, 'r') as f:
    json_data = json.load(f)
topojson = dict(json_data["content"])
with open(file_output, 'w') as f:
    json.dump(topojson, f)

a simple script to extract the topojson from the datawrapper API
In the example the zip codes geometries of Rome