code: def get_changeset(changeset):
      
      url = 'https://www.openstreetmap.org/api/0.6/changeset/{}/download'.format(
          changeset
          )
      return ET.fromstring(requests.get(url).content)
docs: Get the changeset using the OSM API and return the content as a XML
      ElementTree.
  
      Args:
          changeset: the id of the changeset.