kedro.extras.datasets.api.APIDataSet¶

class kedro.extras.datasets.api.APIDataSet(url, method='GET', data=None, params=None, headers=None, auth=None, json=None, timeout=60, credentials=None)[source]¶

APIDataSet loads the data from HTTP(S) APIs. It uses the python requests library: https://requests.readthedocs.io/en/latest/

Example usage for the YAML API:

usda:
  type: api.APIDataSet
  url: https://quickstats.nass.usda.gov
  params:
    key: SOME_TOKEN,
    format: JSON,
    commodity_desc: CORN,
    statisticcat_des: YIELD,
    agg_level_desc: STATE,
    year: 2000

Example usage for the Python API:

from kedro.extras.datasets.api import APIDataSet


data_set = APIDataSet(
    url="https://quickstats.nass.usda.gov",
    params={
        "key": "SOME_TOKEN",
        "format": "JSON",
        "commodity_desc": "CORN",
        "statisticcat_des": "YIELD",
        "agg_level_desc": "STATE",
        "year": 2000
    }
)
data = data_set.load()

Methods

`exists`()	Checks whether a data set’s output already exists by calling the provided _exists() method.
`from_config`(name, config[, load_version, …])	Create a data set instance using the configuration provided.
`load`()	Loads data by delegation to the provided load method.
`release`()	Release any cached data.
`save`(data)	Saves data by delegation to the provided save method.

__init__(url, method='GET', data=None, params=None, headers=None, auth=None, json=None, timeout=60, credentials=None)[source]¶

Creates a new instance of APIDataSet to fetch data from an API endpoint.

Parameters

url (str) – The API URL endpoint.
method (str) – The Method of the request, GET, POST, PUT, DELETE, HEAD, etc…
data (Optional[Any]) – The request payload, used for POST, PUT, etc requests https://requests.readthedocs.io/en/latest/user/quickstart/#more-complicated-post-requests
params (Optional[Dict[str, Any]]) – The url parameters of the API. https://requests.readthedocs.io/en/latest/user/quickstart/#passing-parameters-in-urls
headers (Optional[Dict[str, Any]]) – The HTTP headers. https://requests.readthedocs.io/en/latest/user/quickstart/#custom-headers
auth (Union[Iterable[str], AuthBase, None]) – Anything requests accepts. Normally it’s either ('login', 'password'), or AuthBase, HTTPBasicAuth instance for more complex cases. Any iterable will be cast to a tuple.
json (Union[List, Dict[str, Any], None]) – The request payload, used for POST, PUT, etc requests, passed in to the json kwarg in the requests object. https://requests.readthedocs.io/en/latest/user/quickstart/#more-complicated-post-requests
timeout (int) – The wait time in seconds for a response, defaults to 1 minute. https://requests.readthedocs.io/en/latest/user/quickstart/#timeouts
credentials (Union[Iterable[str], AuthBase, None]) – same as auth. Allows specifying auth secrets in credentials.yml.

Raises

ValueError – if both credentials and auth are specified.

exists()¶

Checks whether a data set’s output already exists by calling the provided _exists() method.

Return type: bool
Returns: Flag indicating whether the output already exists.
Raises: DataSetError – when underlying exists method raises error.

classmethod from_config(name, config, load_version=None, save_version=None)¶

Create a data set instance using the configuration provided.

Parameters

name (str) – Data set name.
config (Dict[str, Any]) – Data set config dictionary.
load_version (Optional[str]) – Version string to be used for load operation if the data set is versioned. Has no effect on the data set if versioning was not enabled.
save_version (Optional[str]) – Version string to be used for save operation if the data set is versioned. Has no effect on the data set if versioning was not enabled.

Return type

AbstractDataSet

Returns

An instance of an AbstractDataSet subclass.

Raises

DataSetError – When the function fails to create the data set from its config.

load()¶

Loads data by delegation to the provided load method.

Return type: ~_DO
Returns: Data returned by the provided load method.
Raises: DataSetError – When underlying load method raises error.

release()¶

Release any cached data.

Raises: DataSetError – when underlying release method raises error.
Return type: None

save(data)¶

Saves data by delegation to the provided save method.

Parameters

data (~_DI) – the value to be saved by provided save method.

Raises

DataSetError – when underlying save method raises error.
FileNotFoundError – when save method got file instead of dir, on Windows.
NotADirectoryError – when save method got file instead of dir, on Unix.

Return type

None