Datasources are responsible for connecting data and compute infrastructure. Each Datasource provides Great Expectations Data Assets connected to a specific compute environment, such as a SQL database, a Spark cluster, or a local in-memory Pandas DataFrame. Datasources know how to access data from relevant sources such as an existing object from a DAG runner, a SQL database, an S3 bucket, GCS, or a local filesystem.
To bridge the gap between those worlds, Datasources can interact closely with Batch Kwargs Generators which are aware of a source of data and can produce produce identifying information, called “batch_kwargs” that datasources can use to get individual batches of data.
See Datasource Reference for more detail about configuring and using datasources in your DataContext.
See datasource module docs
great_expectations.datasource.datasource for more detail about available datasources.