OHGO Wrapper

This is a python package that provides a simple interface to the OHGO API.

Installation

pip install ohgo

Examples

Authentication

from ohgo import OHGOClient

# Register with OHGo for an API Key (https://publicapi.ohgo.com/docs/registration)
client = OHGOClient(api_key='YOUR-API-KEY')

Get Cameras (default page size is 500)

cameras = client.get_cameras()

Get All Cameras

from ohgo.models import QueryParams
params = QueryParams(page_all=True)
cameras = client.get_cameras(params=params)

Get Cameras by Filter

from ohgo.models import QueryParams
from ohgo.types import Region
params = QueryParams(county=Region.COLUMBUS, page_size=10, page=2)
cameras = client.get_cameras(params=params)

Get Camera by ID

camera = client.get_camera(camera_id='YOUR-CAMERA-ID')

Get Images from Camera

camera = client.get_camera(camera_id='YOUR-CAMERA-ID')
images = client.get_images(camera, "small") # Returns [ Image, Image, ... ]

# OR 
camera_view = camera.camera_views[0]
images = client.get_image(camera_view, "small") # Returns Image

Other Endpoints

client.get_digital_signs() # -> List[DigitalSign]
client.get_constructions() # -> List[Construction]
client.get_weather_sensor_sites() # -> List[WeatherSensorSite]
client.get_incidents() # -> List[Incident]
client.get_dangerous_slowdowns() # -> List[DangerousSlowdown]
client.get_travel_delays() # -> List[TravelDelay]
client.get_cameras() # -> List[Camera]

Other Query Objects

from ohgo.models import QueryParams, DigitalSignParams, ConstructionParams, WeatherSensorSiteParams
from ohgo.types import Region, SignType
import datetime
    
# Note: If you use *all* these params you will probably get no results
params = QueryParams(page_size=10, page=2, region=Region.COLUMBUS, map_bounds_sw=(39.9612, -82.9988), map_bounds_ne=(40.0150, -82.8874), radius=(39.9612, -82.9988, 10))
digital_sign_params = DigitalSignParams(sign_type=SignType.DMS)
    
# You can use string in the format 'YYYY-MM-DD', but it is recommended to use datetime objects
construction_params = ConstructionParams(include_future=datetime.datetime.now(), future_only=datetime.datetime.now())
weather_sensor_site_params = WeatherSensorSiteParams(hazards_only=True)

# All params inherit default attributes from QueryParams

Cacheing Responses (ETag)

For convenience, the OHGo API supports ETag headers. If you pass an etag value in the request, the API will return an empty list if there are no changes since the last request. This can be useful for reducing the number of requests made to the API. This applies to all endpoints.

cameras = client.get_cameras() # -> Technically returns CameraListResult object
etag = cameras.etag # -> Store this etag value and pass it in the next request
new_cameras = client.get_cameras(etag=etag) # -> Returns empty list if no changes since last request
cached = new_cameras.cached # -> True if the response was cached
if (cached):
    # use your original set of data
    return cameras
else:
    # use the new set of data
    return new_cameras