datablob

Client for Updating a Simple Data Warehouse on Blob Storage

design philosophy

• optimize for simplicity and user friendliness
• storage is cheap (compared to compute)
• pre-compute as much as possible
• should work out of the box
• advanced configuration should be opt-in
• explicit is better than implicit
• straightforwardness over magic

install

pip install datablob

supported formats

• csv
• geojson (points and polygons)
• json
• json lines
• parquet, including geoparquet
• shapefile (points and polygons)
• tsv
• xlsx (Microsoft Excel)

basic usage

from datablob import DataBlobClient

client = DataBlobClient(
    bucket_name="example-test-bucket-123", bucket_path="prefix/to/dataportal"
)

rows = [
    {
        "name": "Random Building",
        "@lat": 35.XXXXXX,
        "@lon": -85.XXXXXX,
        "@geom": { "type": "Polygon", "coordinates": [...] } // geojson geometry
    }
]

client.update_dataset(
    name="parking_lots", # name of the dataset, shouldn't include spaces or special characters
    version="2", # version of the dataset. It's a string, so you can version as you like.
    data=rows, # list of dictionaries.  Each row is a dictionary.
    latitude_key="@lat", # name of the latitude column 
    longitude="@lon", # name of the longitude column
    polygon_key="@geom", # name of the column with a polygon geometry in it (if applicable)
    xlsx=True # set to True to include an Excel file in output
)
# automatically creates the following files
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/meta.json
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.csv
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.points.geojson
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.polygons.geojson
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.json
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.jsonl
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.parquet
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.points.shp.zip
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.polygons.shp.zip
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.tsv
# s3://example-test-bucket-123/prefix/to/dataportal/buildings/v2/data.xlsx

advanced usage

client.update_dataset(
    name="fleet",
    version="1",
    data=rows,
    column_names=["ID", "Make", "Model", "Year"] # specify column names and their order
    description="List of Vehicles in Fleet",
    xlsx=True,
    xlsx_data_types=["Number", "Text", "Text", "Number"] # specify format of cell values in columns
)

examples

• Clever Vehicle Locations
• OpenStreetMap Parking
• Simple Bus Routes
• Simple Bus Stops
• TN NG911 Address Points