pg.evolution.Slice¶

Accessible via pg.evolution.Slice.

class Slice(op, index)[source]¶

Bases: pg.evolution.Operation

Slice the operation’s output.

A slice operation passes the input the child operation and slice its output based on the index.

Example:

Slice(pg.evolution.Identity(), slice(0, 4, 2))

which is equivalent to:

pg.evolution.Identity()[:4:2]

Methods:

call(inputs, global_state[, step])

Subclasses should override this method.

call(inputs, global_state, step=0)[source]¶

Subclasses should override this method.

The global_state and step are optional for the subclasses’ call signature.

Return type:

List[Any]

Parameters:

inputs – A list of values as inputs.
global_state – An AttributeDict object as the global state container, which is readable/writable during the operation.
step – Number of examples historically proposed, which can be used for determining a cross over schedule.

Returns:

A list of values as output of current operation.