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Load example datasets *remotely* from `vega-datasets`_.
Provides **70+** datasets, used throughout our `Example Gallery`_.
You can learn more about each dataset at `datapackage.md`_.
Examples
--------
**Primary Interface - Data Object**::
from altair.datasets import data
# Load with default engine (pandas)
cars_df = data.cars()
# Load with specific engine
cars_polars = data.cars(engine="polars")
cars_pyarrow = data.cars(engine="pyarrow")
# Get URL
cars_url = data.cars.url
# Set default engine for all datasets
data.set_default_engine("polars")
movies_df = data.movies() # Uses polars engine
# List available datasets
available_datasets = data.list_datasets()
**Expert Interface - Loader**::
from altair.datasets import Loader
load = Loader.from_backend("polars")
load("penguins")
load.url("penguins")
This method also provides *precise* Tab completions on the returned object::
load("cars").
# bottom_k
# drop
# drop_in_place
# drop_nans
# dtypes
# ...
**Expert Interface - Direct Functions**::
from altair.datasets import load, url
# Load a dataset
cars_df = load("cars", backend="polars")
# Get dataset URL
cars_url = url("cars")
.. note::
Requires installation of either `polars`_, `pandas`_, or `pyarrow`_.
.. _vega-datasets:
https://github.com/vega/vega-datasets
.. _Example Gallery:
https://altair-viz.github.io/gallery/index.html#example-gallery
.. _datapackage.md:
https://github.com/vega/vega-datasets/blob/main/datapackage.md
.. _polars:
https://docs.pola.rs/user-guide/installation/
.. _pandas:
https://pandas.pydata.org/docs/getting_started/install.html
.. _pyarrow:
https://arrow.apache.org/docs/python/install.html
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Return the address of a remote dataset.
This is an expert interface. For most users, the data object interface is recommended::
from altair.datasets import data
cars_url = data.cars.url
Parameters
----------
name
Name of the dataset/`Path.stem`_.
suffix
File extension/`Path.suffix`_.
.. note::
Only needed if ``name`` is available in multiple formats.
Returns
-------
``str``
.. _Path.stem:
https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.stem
.. _Path.suffix:
https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.suffix
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