Simple key/value store with json and python flask

client.py

#!/usr/bin/env python3

import http.client
import json

connection = http.client.HTTPConnection('localhost', port=5000)
headers = {'Content-type': 'application/json'}
connection.request('GET', '/set/foo?value=474', headers=headers)

response = connection.getresponse().read()

d = json.loads(response.decode())
print('uptime = %s s' % d['uptime'])
print('data = %s' % d['data'])

server.py

#!/usr/bin/env python3

from flask import Flask, jsonify, request
import threading
import time

# Set key "field1": http://localhost:5000/set/field1?value=42
# Get key "field1": http://localhost:5000/get/field1
# Get all :         http://localhost:5000/get
# Clear all :       http://localhost:5000/clear

app = Flask(__name__)
lock = threading.Lock()

d = {}
d['data'] = {}

def update_thread():
    global d
    while True:
        with lock:
            d['uptime'] = d.get('uptime', 0) + 1
        time.sleep(1.0)

@app.route('/clear', methods=['GET'])
def clear():
    global d
    with lock:
        d['data'] = {}
        return jsonify(d)

@app.route('/get', methods=['GET'])
def get():
    with lock:
        return jsonify(d)

@app.route('/get/<name>', methods=['GET'])
def get_name(name):
    with lock:
        return jsonify(d['data'].get(name, {}))

@app.route('/set/<name>', methods=['GET', 'POST'])
def set(name):
    global d
    with lock:
        d['data'][name] = d['data'].get(name, {})
        d['data'][name]['value'] = request.args.get('value') or float('nan')
        d['data'][name]['time'] = time.time()
        return jsonify(d)

if __name__ == '__main__':
    threading.Thread(target=update_thread).start()
    app.run(threaded=True, debug=True)