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Listener

  • apply a model to compute outputs on a query
  • outputs are refreshed every-time new data are added
  • outputs are saved to the db.databackend

dependencies

usage pattern

(learn how to build a model here)

from superduperdb import Listener
m = ...  # build a model
q = ... # build a select query

# either...
listener = Listener(
    mode=m,
    select=q,
    key='x',
)

# or...
listener = m.to_listener(select=q, key='x')

db.apply(listener)
info

how do i choose the key parameter? key refers to the field, or fields which will be fed into the model as *args and **kwargs

the following forms are possible:

  • key='x',
  • key=('x','y'),
  • key={'x': 'x', 'y': 'y'},
  • key=(('x',), {'y': 'y'}),

see also