pg.evolution.Power¶

Accessible via pg.evolution.Power.

class Power(op, k)[source]¶

Pipeline a repeated operation multiple times.

Power(x, k) (or x ** k) is equivalent to x >> x >> … >> x (k items).

Example:

pg.evolution.Power(pg.evolution.mutators.Uniform, 3)

which is equivalent to:

pg.evolution.mutators.Uniform() ** 3

The code above creates a DNA with 3 mutated positions for each DNA in the input,

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[pg.DNA]

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.