create_buildings_named_map.py

import os
import sys
import argparse

from carto.auth import APIKeyAuthClient
from carto.maps import NamedMapManager


parser = argparse.ArgumentParser(description=(
    'Example of CopySQLClient usage to stream data from NEXRAD Level 2'
    ' data to CARTO.'
))

parser.add_argument('--base_url', type=str, dest='CARTO_BASE_URL',
                    default=os.environ.get('CARTO_API_URL', ''),
                    help=('Set the base URL. For example:'
                          ' https://username.carto.com/'
                          ' (defaults to env variable CARTO_API_URL)'))

parser.add_argument('--api_key', dest='CARTO_API_KEY',
                    default=os.environ.get('CARTO_API_KEY', ''),
                    help=('Api key of the account'
                          ' (defaults to env variable CARTO_API_KEY)'))

parser.add_argument('--datasets', dest='DATASETS',
                    default=os.environ.get('DATASETS', ''),
                    help=('Name of the datasets to download'
                          ' (defaults to None)'))

args = parser.parse_args()

if not args.CARTO_BASE_URL or not args.CARTO_API_KEY or not args.DATASETS:
    sys.exit(parser.print_usage())

auth_client = APIKeyAuthClient(args.CARTO_BASE_URL, args.CARTO_API_KEY)

def create_named_map(dataset_name):
    template = {
      "version": "0.0.1",
      "name": 'tpl_' + dataset_name,
      "auth": {
        "method": "open"
      },
      "placeholders": {},
      "view": {},
      "layergroup": {
        "version": "1.0.1",
        "layers": [
          {
              "type": "plain",
              "options": {
                "color": "#ffffff"
              }
            },
          {
            "type": "cartodb",
            "options": {
              "cartocss_version": "2.1.1",
              "cartocss": "#layer {  polygon-fill: #000000;  polygon-opacity: 0.9;} #layer::outline {  line-width: 0.1;  line-color: #000000;  line-opacity: 1;}",
              "sql": "select * from buildings"
            }
          }
        ]
      }
    }

    named_map_manager = NamedMapManager(auth_client)

    try:
      named_map = named_map_manager.get('tpl_' + dataset_name)
      if named_map is not None:
          named_map.client = auth_client
          named_map.delete()
    except Exception as e:
      #ignore
      print(e)

    return named_map_manager.create(template=template)

create_named_map('buildings')