geomelon

Python client for the Geomelon API — cities, countries, regions, and languages with multilingual support (50+ languages).

• Zero dependencies — standard library only (urllib)
• Python 3.8+ — tested on 3.8 through 3.14
• Fully typed — dataclass models, py.typed marker, works with mypy/pyright
• Sync API, one sub-client per resource, mirroring the TypeScript client

Install

pip install geomelon

Try it — no API key needed

City autocomplete via the free oneshot endpoint, zero signup:

from geomelon import GeomelonClient

client = GeomelonClient()  # no key
for city in client.oneshot.search("es", "es", "barc"):
    print(city.name, city.population, city.emoji)
# Barcelona 1620343 🇪🇸

search(iso, lang, prefix) takes an ISO 3166-1 alpha-2 country code, a BCP 47 language code, and the city-name prefix as the user typed it — the server normalizes case, punctuation, and diacritics ("Sant Cugat", "barç", and "barc" all work). Everything else (full-text search, filters, coordinates, countries, regions, translations) requires an API key.

Quickstart

Get an API key from RapidAPI.

from geomelon import GeomelonClient

client = GeomelonClient(api_key="YOUR_RAPIDAPI_KEY")

# Prefix search with multilingual names
cities = client.cities.search(name="barc", country_code="ES", preferred_languages="es,en")
for city in cities:
    print(city.name, city.population, city.country_emoji)
# Barcelona 1620343 🇪🇸

# Single city by UUID
barcelona = client.cities.get("964512d1-f150-4876-87ec-0ba47aef694a")
print(barcelona.time_zone)          # Europe/Madrid
print(barcelona.translations[0])    # CityTranslation(language='es', name='Barcelona')

# Nearest cities to coordinates
nearby = client.cities.by_coordinates_closest(41.3828, 2.1769, preferred_languages="es")

# Countries, regions, languages
spain = client.countries.get("a1e06cc1-817c-429f-84f4-6ab51dac9bfa")
print(spain.iso_code, len(spain.regions))

# Distance between two cities (km)
dist = client.cities.distance(city1="<uuid-1>", city2="<uuid-2>")
print(dist.distance_km)

# Oneshot: pre-built static prefix search (fastest path)
results = client.oneshot.search("es", "es", "ba")

With an API key, oneshot requests route through the RapidAPI gateway and count toward your plan. Pass free_oneshot=True to send them to the free keyless host instead:

client = GeomelonClient(api_key="YOUR_RAPIDAPI_KEY", free_oneshot=True)

API surface

All method parameters are keyword arguments in snake_case; they map 1:1 to the API's camelCase query parameters (country_code → countryCode). None parameters are omitted from the request. Response models are dataclasses with snake_case fields; unknown response fields are ignored, so API additions never break older client versions.

Error handling

All failures raise GeomelonError:

from geomelon import GeomelonClient, GeomelonError

client = GeomelonClient(api_key="YOUR_RAPIDAPI_KEY")
try:
    client.cities.search(name="barc")
except GeomelonError as err:
    if err.is_rate_limited:   # HTTP 429
        ...
    print(err.status, err.body, err.url)

status is None for network-level failures (DNS, timeout, connection refused).

Configuration

GeomelonClient(
    api_key="...",                   # optional; omit for free-oneshot-only mode
    host="geomelon.p.rapidapi.com",  # override for staging/custom gateways
    timeout=30.0,                    # seconds, per request
    free_oneshot=False,              # route oneshot to the keyless host even with a key
)

Calling a keyed endpoint on a keyless client raises GeomelonError immediately (no network request) with a message pointing to the RapidAPI signup.

Development

python -m unittest discover -s tests -v   # run tests (no dev dependencies needed)
python -m build                            # build sdist + wheel (pip install build)

Publishing runs through GitHub Actions with PyPI trusted publishing on GitHub release — see .github/workflows/publish.yml.

License

MIT