def CheckFileExist(filename, silent=True):
if not os.path.exists(filename):
if not silent:
logger.warning('{} does not exist'.format(filename))
return False
return True
def load_hyperparameters(self, filename):
if not CheckFileExist(filename, silent=False):
logger.warning('no hpo parameters load from {}'.format(filename))
return {}
with open(filename, 'rb') as f:
params = pickle.load(f)
logger.info('load from {} with params:{}'.format(filename, params))
return params
def _evaluate(self, eval_params):
eval_params = dict(zip(self.eval_params_name, eval_params))
tuning_params = self.init_params.copy()
tuning_params.update(eval_params)
# reinitialize cv
cv_obj = self.nr_fold
if self.valid_type == 'TimeSeriesSplit':
cv_obj = model_selection_object[self.valid_type](
n_splits=self.nr_fold)
elif 'KFold' in self.valid_type:
cv_obj = model_selection_object[self.valid_type](
n_splits=self.nr_fold,
shuffle=True,
random_state=self.split_seed)
if self.set_params_safe:
try:
m = self.model().set_params(**tuning_params)
except:
logger.warning('fail to use set_params')
m = self.model(**tuning_params)
logger.warning('model params={}'.format(m.get_params()))
else: # unless some parameters cannot pass through set_params()
m = self.model(**tuning_params)
score = np.mean(
cross_val_score(m,
self.X,
self.y,
cv=cv_obj,
n_jobs=1,
scoring=self.metric))
self.nr_iteration += 1
self.best_score = max(self.best_score, score)
# save the current best paramerters here
if self.best_score == score:
# update new result
self.filestem_meta.update({'score': score})
self.optimized_params = tuning_params.copy()
if self.nr_iteration >= self.n_init_points:
self.save_hyperparameters(show_iter=True)
else:
self.save_hyperparameters(show_iter=False)
if self.nr_iteration == self.n_init_points: # save after intinializing
self.save_hyperparameters(show_iter=False)
logger.info(
'iteration {:04d}/{:04d}, current score: {:04f}, best: {:.4f}, current params: {}, best params: {}'
.format(self.nr_iteration, self.n_calls, score, self.best_score,
tuning_params, self.optimized_params))
return -score # for minimize, most scikit-learn metric are larger the better
def CullFeatures(self, x, blacklist=list()):
if not blacklist:
logger.warning('empty blacklist')
return x
before = x.shape
x = x[[f for f in x.columns if f not in blacklist]]
logger.info('shrink from {} to {} by {}'.format(before, x.shape, len(blacklist)))
return x
def GetBlacklist(self, threshold=10.):
if self.importance_series.empty:
logger.warning('no feature')
return list()
logger.info('create blacklist on score <= {}'.format(threshold))
ret = self.importance_series.loc[self.importance_series <= threshold].index.tolist()
logger.info('return blacklist of {} from {} features'.format(len(ret), len(self.importance_series)))
return ret
def ReturnTrainTest(configs):
df_names = ['train_x', 'train_y', 'test_x', 'test_y']
configs.update({
k: pd.DataFrame()
for k, v in configs.items() if k not in df_names
})
for df_name in [k for k, v in configs.items() if v.empty]:
logger.warning("no key as {}".format(df_name))
# return train_x, train_y, test_x, test_y
return configs['train_x'], configs['train_y'], configs[
'test_x'], configs['test_y']
def AnyEmptyDataframe(data):
if not data:
logger.warning('passing no dataframes')
return True
if isinstance(data, dict):
return any([v.empty for k, v in data.items()])
elif isinstance(data, list):
return any([l.empty for l in data])
return False
def process_interaction(df, process_configs):
"""
process configs is a dictionary as
a dictionary with {'new_feature_name': {'mode': 'add', 'a': 'col_name', 'b':'col_name',}, }
------
"""
logger.info("Process Interactions")
possible_arithmetics = ['add', 'sum_squared',
'subtract', 'subtract_positive',
'multiply',
'divide', 'divide_nonzero']
new_columns = []
for v in process_configs:
k = v['name']
logger.info("process {}".format(k))
# check arithmetic
arithmetic = v.get('mode', None)
if arithmetic not in possible_arithmetics:
logger.warning("no arithmetic on {}".format(k))
continue
#check feature columns
ckeck_cols = [vv for kk, vv in v.items() if kk not in ['name', 'mode']]
cols_exist, cols_not_exist = CheckColumnsExist(df, ckeck_cols)
if cols_not_exist:
logger.warning("missing {} columns: {}".format(len(cols_not_exist), cols_not_exist))
continue
# process
if 'add' == arithmetic:
df[k] = df[v['a']] + df[v['b']]
elif 'subtract' == arithmetic:
df[k] = df[v['a']] - df[v['b']]
elif 'subtract_positive' == arithmetic:
df[k] = (df[v['a']] - df[v['b']]).apply(lambda x: x if x > 0 else 0)
elif 'multiply' == arithmetic:
df[k] = df[v['a']] * df[v['b']]
elif 'divide' == arithmetic:
df[k] = df[v['a']] / df[v['b']]
elif 'divide_nonzero' == arithmetic:
df[k] = df[v['a']] / (df[v['b']] + 1.)
elif 'sum_squared' == arithmetic:
df[k] = df[[v['a'], v['b']]].pow(2).sum(axis=1)# np.square(df[v['a']]) + np.square(df[v['b']])
new_columns.append(k)
return df, new_columns
def process_factorize(df, process_configs):
"""
input a list of features to factorize (label encoding)
"""
logger.info("Process Factorize")
cols_exist, cols_not_exist = CheckColumnsExist(df, sorted(process_configs))
for bin_feature in cols_exist:
df[bin_feature], uniques = pd.factorize(df[bin_feature], sort=False)
logger.info("factorize {} in {}: {}".format(len(uniques), bin_feature, uniques))
for k in cols_not_exist:
logger.warning("missing {}".format(k))
return df
def saveHDF(self, filename, data, opt_overwrite=True, opt_fast=False):
if self.checkFile(filename):
if not opt_overwrite:
logger.warning("overwrite is not allowed")
return False
compress_option = hdf5_compress_option
if opt_fast:
logger.info("use faster compression option")
compress_option = fast_hdf5_compress_option
with pd.HDFStore(filename, 'w', **compress_option) as store:
logger.info("Save to {}".format(filename))
for k, d in data.items():
store.put(k, d, format='table')
#store.put(k, d, format='fixed')
logger.info("Save {}: {}".format(k, d.shape))
def process_replace(df, process_configs):
"""
{'DAYS_EMPLOYED': {365243: np.nan, }, }
"""
logger.info("Process Fill NA")
columns = sorted(list(process_configs.keys()))
cols_exist, cols_not_exist = CheckColumnsExist(df, columns)
configs = {k: v for k, v in process_configs.items() if k in cols_exist}
df.replace(configs, inplace=True)
for k, v in configs.items():
logger.info("impute {} using {}".format(k, v))
if cols_not_exist:
logger.warning("missing {} columns: {}".format(len(cols_not_exist), cols_not_exist))
return df
def process_aggregate(df, process_configs, groupby_cols, cat_cols=[]):
"""
pass each groupby_cols one by one: aggregate and condictional aggregate, general aggregate
"""
logger.info("Process Aggregate")
groupby_cols = [f for f in groupby_cols if f in df.columns]
# if groupby_cols not in df.columns:
if not groupby_cols:
logger.warning("aggregate column {} not exist".format(groupby_cols))
return pd.DataFrame({groupby_cols:[]}).set_index(groupby_cols)
logger.info("aggregate on {}".format(groupby_cols))
header = process_configs.get('header', 'foobar')
aggregations = {}
# aggregate and condictional aggregate
num_cols = process_configs.get('num', {})
cat_agg = process_configs.get('cat', [])
if num_cols or cat_agg:
aggregations = {k:list(v) for k, v in num_cols.items() if k in df.columns and v}
aggregations.update({k:list(cat_agg) for k in cat_cols if k in df.columns and cat_agg})
for k, v in aggregations.items(): # dict
logger.info("aggregate {} ({}) with {}".format(k, df[k].dtype, v))
# assigned in configs but not in dataframe
missing = sorted(list(set(num_cols.keys()).union(set(cat_cols)).difference(set(aggregations.keys()))))
for k in missing: # dict
if k in num_cols.keys():
logger.info("missing {} in num".format(k))
elif k in cat_cols:
logger.info("missing {} in cat".format(k))
# processing
if aggregations:
df_agg = df.groupby(groupby_cols).agg({**aggregations})
df_agg.columns = pd.Index(['{}_{}_{}'.format(header, e[0], e[1].upper()) for e in df_agg.columns.tolist()])
else:
logger.info("no aggragation on {} and {}".format(header, groupby_cols))
df_agg = pd.DataFrame({groupby_cols:[]}).set_index(groupby_cols)
if process_configs.get('count', False):
logger.info("aggregate count on {} at {}".format(groupby_cols, header))
df_agg['{}_COUNT_{}'.format(header, '_'.join(groupby_cols))] = df.groupby(groupby_cols).size()
return df_agg
def __init__(self, model, configs={}, task_name=None, data_prefix=None):
self.model = model
self.task_name = task_name
self.data_prefix = data_prefix
self.params_dir = file_dir_path.get('params', '../params')
#skopt
search_settings = configs.get("search_settings", {})
self.n_calls = search_settings.get("n_calls", 15)
self.random_state = search_settings.get("random_state", 42)
self.n_init_points = search_settings.get("n_inits", 10)
if self.n_init_points >= self.n_calls:
logger.warning(
'initial points {} is larger than n_calls {}'.format(
self.n_init_points, self.n_calls))
#validation
evalute_settings = configs.get("evaluation_settings", {})
self.valid_type = evalute_settings.get("validation", "KFold")
self.nr_fold = evalute_settings.get("nr_fold", 3)
self.split_seed = evalute_settings.get("split_seed", 42)
self.metric = evalute_settings.get("eval_metric", "neg_log_loss")
#model
self.init_params = configs.get("initialize", {})
self.search_space = configs.get("search_space", {})
self.set_params_safe = self._check_parameters()
self.optimized_params = {}
self.filename_hpo_iter = ''
self.filename_hpo_best = ''
#initializing
self._search_space_initialize()
#
self.filestem_meta = {
'level': 0,
'model': self.task_name,
'feature_num': 0,
'score': 0,
'fold': self.nr_fold,
}
def LoadResult(self, result_files):
if not result_files:
logger.warning('no result file to rank features')
return False
elif len(result_files) == 1:
ret = DataFileIO().loadHDF('{loc}/{filename}'.format(loc=self.result_dir,
filename=result_files[0]))
df = ret.get('feature_importance', pd.DataFrame())
else:
logger.info('concate {} results to rank features'.format(len(result_files)))
rets = list()
for f in result_files:
rets.append(DataFileIO().loadHDF('{loc}/{filename}'.format(loc=self.result_dir, filename=f)))
rets = [ret.get('feature_importance', pd.DataFrame()) for ret in rets]
df = pd.concat(rets, axis=1)
self._analyzeFeatures(df)
def process_drop_rows(df, process_configs):
"""
{'CODE_GENDER': ['XNA'], }
"""
logger.info("Process Drop Rows")
columns = sorted(list(process_configs.keys()))
cols_exist, cols_not_exist = CheckColumnsExist(df, columns)
configs = {k: v for k, v in process_configs.items() if k in cols_exist}
inds = df[cols_exist].isin(configs)
inds_sel = inds.any(axis=1)
for f, series in inds.iteritems():
logger.info("remove {} rows by in {} if any {}".format(f, series.sum(), process_configs[f]))
logger.info("overall remove {} from {} rows".format(inds_sel.astype(int).sum(), inds_sel.shape[0]))
if cols_not_exist:
logger.warning("missing {} columns: {}".format(len(cols_not_exist), cols_not_exist))
return df.loc[~inds_sel]
def process_deep_interactions(df, process_configs):
"""
{'header' : 'EXT_SOURCES_SYNTHESIZE',
'transform': ['product', 'mean', 'sum', 'sum_squared', 'std'],
'columns' : ['EXT_SOURCE_1', 'EXT_SOURCE_2', 'EXT_SOURCE_3'],
}
"""
applicable_methods = ['kurtosis', 'sum', 'sum_squared', 'product', 'mean', 'std']
header = process_configs.get('header', 'NEW')
cols = process_configs.get('columns', [])
cols_na = [f for f in cols if f not in df.columns]
cols = [f for f in cols if f in df.columns]
methods = process_configs.get('transform', [])
methods = [m for m in methods if m in applicable_methods]
for m in methods:
logger.info('transform deep interactions ({}): {}'.format(m, cols))
if cols_na:
logger.warning('transform deep interactions ({}), features not found: {}'.format(
m, cols_na))
name = '{}_{}'.format(header, m.upper())
if m == 'kurtosis':
df[name] = df[cols].kurtosis(axis=1)
elif m == 'mean':
df[name] = df[cols].mean(axis=1)
elif m == 'sum':
df[name] = df[cols].sum(axis=1)
elif m == 'sum_squared':
df[name] = df[cols].pow(2).sum(axis=1)
elif m == 'product':
df[name] = df[cols].fillna(df[cols].mean()).product(axis=1)
elif m == 'std':
df[name] = df[cols].std(axis=1)
df[name] = df[name].fillna(df[name].mean())
return df
def save_hyperparameters(self,
export=False,
show_iter=True,
remove_old=True):
if not self.optimized_params:
logger.warning('need to run optimize first')
return False
params = SwitchDevice(self.optimized_params, enable_gpu=False)
if export:
filename = filename_hpo_external.format(loc=self.params_dir,
prefix=self.data_prefix,
task=self.task_name)
logger.warning('export for external module: {}'.format(filename))
self._save_pickle(filename, obj=params)
return filename
if remove_old and CheckFileExist(self.filename_hpo_best, silent=True):
os.remove(self.filename_hpo_best)
stem = self._current_file_stem()
if show_iter:
self.filename_hpo_iter = filename_hpo_intermediate.format(
loc=self.params_dir,
prefix=self.data_prefix,
iter_num=self.nr_iteration,
stem=stem)
self._save_pickle(self.filename_hpo_iter, obj=params)
#write current best anyway
self.filename_hpo_best = filename_hpo_result.format(
loc=self.params_dir, prefix=self.data_prefix, stem=stem)
self._save_pickle(self.filename_hpo_best, obj=params)
#self.load_hyperparameters(filename) # attemp to reload
return True
def LoadData(self, data_configs, source='from_csv', prefix='sample'):
"""
"""
#initialize, reading in configs for data provider itself
configs_table = pd.DataFrame(self.provider_configs).T
configs_table['level'] = configs_table['level'].astype(int)
configs_table.set_index('level', inplace=True)
configs_table['filename'] = configs_table['filename'].apply(
lambda x: x.format(header=prefix) if isinstance(x, str) else None)
provider_configs = self.provider_configs.get(source,
'from_csv').copy() #
refresh_level = provider_configs.get('level')
# load data at its refresh level
filename = '{}/{}'.format(self.cache_path,
configs_table.loc[refresh_level, 'filename'])
if refresh_level == 3:
logger.info("Load Train and Test from Cache")
self.ReadTrainTestHDF(data_configs['input'], filename)
if not AnyEmptyDataframe(self.xy_train_test):
return self.ReturnTrainTest(self.xy_train_test)
else:
refresh_level = 2
logger.warning(
'No train_test cache to load. Try to refresh at level {}'.
format(refresh_level))
filename = '{}/{}'.format(
self.cache_path, configs_table.loc[refresh_level,
'filename'])
if refresh_level == 2:
logger.info("Recreate Train and Test")
self.ReadProcessedHDF(data_configs['input'], filename)
if AnyEmptyDataframe(self.data_processed):
refresh_level = 1
logger.warning(
'no processed cache to load from disk. Attempt to refresh at level {}'
.format(refresh_level))
filename = '{}/{}'.format(
self.cache_path, configs_table.loc[refresh_level,
'filename'])
if refresh_level == 1:
logger.info("Process DataFrames from HDF Cashe")
self.ReadRawHDF(data_configs['input'],
filename,
limited_by_configs=True)
if AnyEmptyDataframe(self.data_raw):
refresh_level = 0
logger.warning(
'No raw cache to load. Try to refresh at level {}'.format(
refresh_level))
if refresh_level == 0:
logger.info("Process DataFrames from CSV")
self.ReadDataCSV(data_configs['input'])
filename = '{}/{}'.format(self.cache_path,
configs_table.loc[1, 'filename'])
self.SaveFileHDF(filename, self.data_raw, opt_overwrite=True)
# process data
if refresh_level <= 1:
logger.info("Process DataFrames")
train_test = self._application_train_test(
data_configs['application'])
self.data_processed = {
'application_train': train_test[0],
'application_test': train_test[1],
}
self.data_processed.update({
'bureau':
self._bureau_and_balance(data_configs['bureau']),
'previous_application':
self._previous_application(
data_configs['previous_application']),
'pos_cash':
self._pos_cash_balance(data_configs['pos_cash']),
'credit_card_balance':
self._credit_card_balance(data_configs['credit_card_balance']),
'installments_payments':
self._installments_payments(
data_configs['installments_payments']),
})
# save processed
filename = '{}/{}'.format(self.cache_path,
configs_table.loc[2, 'filename'])
self.SaveFileHDF(filename, self.data_processed, opt_overwrite=True)
# create train and test
if refresh_level <= 2:
self.CreateTrainTestData(self.data_processed)
filename = '{}/{}'.format(self.cache_path,
configs_table.loc[3, 'filename'])
self.SaveFileHDF(filename, self.xy_train_test, opt_overwrite=True)
return self.ReturnTrainTest(self.xy_train_test)
def get_optimal_parameters(self):
if not self.optimized_params:
logger.warning('need to run optimize first')
return self.optimized_params.copy()