skopt.callbacks.CheckpointSaver

class skopt.callbacks.CheckpointSaver(checkpoint_path, **dump_options)

Save current state after each iteration with skopt.dump. Allows to re- use previously computed function evaluations.

Parameters:

checkpoint_pathstring

location where checkpoint will be saved to;

dump_optionsstring

options to pass on to skopt.dump, like compress=9

Examples

>>> import skopt
>>> def obj_fun(x):
...     return x[0]**2
>>> checkpoint_callback = skopt.callbacks.CheckpointSaver("./result.pkl")
>>> skopt.gp_minimize(obj_fun, [(-2, 2)], n_calls=10,
...                   callback=[checkpoint_callback]) 
>>> # when re-using stored results.
>>> checkpoint_callback = skopt.callbacks.CheckpointSaver("./result.pkl")
>>> skopt.gp_minimize(obj_fun, [(-2, 2)], n_calls=10,
...                   callback=[checkpoint_callback]
...                   **checkpoint_callback.load()) 

Methods

__call__(res)	Parameters:
load()	Loads from disk previously evaluated points.

__init__(checkpoint_path, **dump_options)

load()

Loads from disk previously evaluated points.

Returns:

Dict with previous evaluations and their latest surrogate state.