public_library_map/merge_to_topo.py

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#!/usr/bin/env python3
import csv
import json
# files to merge
csv_file = 'website/data/library_services_information.csv'
topojson_file = 'website/data/boundaries.topo.json'
geo = open(topojson_file, 'r') # open the topo.json file
json_data = json.loads(geo.read()) # read the file and load into a dict
# for each feature, if the name in the json matches the name in the csv, add new properties to the json
for feature in json_data['objects']['boundaries']['geometries']:
with open(csv_file, newline='') as f:
# use DictReader so we can use the header names
reader = csv.DictReader(f)
for row in reader:
# look for match
if row['name'] == feature['properties']['name']:
# create new properties in topojson
for k in row:
if k != "long_name" and k != "": # ignore long_name and any blank column names
feature['properties'][k] = row[k]
f.close() # close csv
geo.close() # close geo and flush
# open topojson file again and overwrite it
with open(topojson_file, 'w') as newfile:
json.dump(json_data, newfile, separators=(',', ':'))
newfile.close()