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# Author: Simon Blanke |
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# Email: [email protected] |
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# License: MIT License |
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import random |
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from tqdm.auto import tqdm |
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import scipy |
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import numpy as np |
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import pandas as pd |
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import multiprocessing |
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from .util import merge_dicts |
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class Core: |
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def __init__(self, *args, **kwargs): |
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kwargs_base = { |
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"n_iter": 10, |
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"max_time": None, |
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"optimizer": "RandomSearch", |
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"n_jobs": 1, |
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"verbosity": 2, |
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"warnings": True, |
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"random_state": None, |
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"warm_start": False, |
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"memory": True, |
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"scatter_init": False, |
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"meta_learn": False, |
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"proxy_dataset": False, |
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"get_search_path": False, |
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} |
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self.search_config = args[0] |
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self.opt_para = dict() |
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if "optimizer" in kwargs and isinstance(kwargs["optimizer"], dict): |
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opt = list(kwargs["optimizer"].keys())[0] |
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self.opt_para = kwargs["optimizer"][opt] |
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kwargs["optimizer"] = opt |
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kwargs_base = merge_dicts(kwargs_base, kwargs) |
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self._set_general_args(kwargs_base) |
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self.model_list = list(self.search_config.keys()) |
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self.n_models = len(self.model_list) |
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self.set_n_jobs() |
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self._n_process_range = range(0, int(self.n_jobs)) |
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if self.max_time: |
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self.max_time = self.max_time * 3600 |
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def _set_general_args(self, kwargs_base): |
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self.n_iter = kwargs_base["n_iter"] |
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self.max_time = kwargs_base["max_time"] |
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self.optimizer = kwargs_base["optimizer"] |
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self.n_jobs = kwargs_base["n_jobs"] |
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self.verbosity = kwargs_base["verbosity"] |
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self.warnings = kwargs_base["warnings"] |
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self.random_state = kwargs_base["random_state"] |
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self.warm_start = kwargs_base["warm_start"] |
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self.memory = kwargs_base["memory"] |
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self.scatter_init = kwargs_base["scatter_init"] |
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self.meta_learn = kwargs_base["meta_learn"] |
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self.get_search_path = kwargs_base["get_search_path"] |
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def init_p_bar(self, _core_, _cand_): |
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if self.verbosity == 2: |
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self.p_bar = tqdm(**_core_._tqdm_dict(_cand_)) |
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else: |
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self.p_bar = None |
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def update_p_bar(self, n, _cand_): |
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if self.p_bar: |
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self.p_bar.update(n) |
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self.p_bar.set_postfix(best_score=str(_cand_.score_best)) |
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def close_p_bar(self): |
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if self.p_bar: |
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self.p_bar.close() |
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def _tqdm_dict(self, _cand_): |
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"""Generates the parameter dict for tqdm in the iteration-loop of each optimizer""" |
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return { |
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"total": self.n_iter, |
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"desc": "Thread " |
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+ str(_cand_.nth_process) |
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+ " -> " |
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+ _cand_._model_.func_.__name__, |
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"position": _cand_.nth_process, |
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"leave": True, |
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} |
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def _set_random_seed(self, thread=0): |
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"""Sets the random seed separately for each thread (to avoid getting the same results in each thread)""" |
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if self.random_state: |
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rand = int(self.random_state) |
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else: |
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rand = 0 |
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random.seed(rand + thread) |
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np.random.seed(rand + thread) |
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scipy.random.seed(rand + thread) |
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def _check_data(self, X, y): |
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"""Checks if data is pandas Dataframe and converts to numpy array if necessary""" |
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if isinstance(X, pd.core.frame.DataFrame): |
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X = X.values |
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if isinstance(y, pd.core.frame.DataFrame): |
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y = y.values |
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return X, y |
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def set_n_jobs(self): |
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"""Sets the number of jobs to run in parallel""" |
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num_cores = multiprocessing.cpu_count() |
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if self.n_jobs == -1 or self.n_jobs > num_cores: |
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self.n_jobs = num_cores |
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SimonBlanke /
Hyperactive
