to_placeholder

Factory function for extracting placeholders from a DataFrame or View.

Example:

Suppose we wanted to create a DataModel:

dm = getml.data.DataModel(
    population_train.to_placeholder("population")
)

# Add placeholders for the peripheral tables.
dm.add(meta.to_placeholder("meta"))
dm.add(order.to_placeholder("order"))
dm.add(trans.to_placeholder("trans"))

But this is a bit repetitive. So instead, we can do the following:

dm = getml.data.DataModel(
    population_train.to_placeholder("population")
)

# Add placeholders for the peripheral tables.
dm.add(getml.data.to_placeholder(
    meta=meta, order=order, trans=trans))