def main(inputs,
infile_estimator,
infile1,
infile2,
outfile_result,
outfile_object=None,
outfile_weights=None,
groups=None,
ref_seq=None,
intervals=None,
targets=None,
fasta_path=None):
"""
Parameter
---------
inputs : str
File path to galaxy tool parameter
infile_estimator : str
File path to estimator
infile1 : str
File path to dataset containing features
infile2 : str
File path to dataset containing target values
outfile_result : str
File path to save the results, either cv_results or test result
outfile_object : str, optional
File path to save searchCV object
outfile_weights : str, optional
File path to save model weights
groups : str
File path to dataset containing groups labels
ref_seq : str
File path to dataset containing genome sequence file
intervals : str
File path to dataset containing interval file
targets : str
File path to dataset compressed target bed file
fasta_path : str
File path to dataset containing fasta file
"""
warnings.simplefilter('ignore')
# store read dataframe object
loaded_df = {}
with open(inputs, 'r') as param_handler:
params = json.load(param_handler)
# Override the refit parameter
params['search_schemes']['options']['refit'] = True \
if params['save'] != 'nope' else False
with open(infile_estimator, 'rb') as estimator_handler:
estimator = load_model(estimator_handler)
optimizer = params['search_schemes']['selected_search_scheme']
optimizer = getattr(model_selection, optimizer)
# handle gridsearchcv options
options = params['search_schemes']['options']
if groups:
header = 'infer' if (
options['cv_selector']['groups_selector']['header_g']) else None
column_option = (
options['cv_selector']['groups_selector']
['column_selector_options_g']['selected_column_selector_option_g'])
if column_option in [
'by_index_number', 'all_but_by_index_number', 'by_header_name',
'all_but_by_header_name'
]:
c = (options['cv_selector']['groups_selector']
['column_selector_options_g']['col_g'])
else:
c = None
df_key = groups + repr(header)
groups = pd.read_csv(groups, sep='\t', header=header, parse_dates=True)
loaded_df[df_key] = groups
groups = read_columns(groups,
c=c,
c_option=column_option,
sep='\t',
header=header,
parse_dates=True)
groups = groups.ravel()
options['cv_selector']['groups_selector'] = groups
splitter, groups = get_cv(options.pop('cv_selector'))
options['cv'] = splitter
primary_scoring = options['scoring']['primary_scoring']
options['scoring'] = get_scoring(options['scoring'])
if options['error_score']:
options['error_score'] = 'raise'
else:
options['error_score'] = np.NaN
if options['refit'] and isinstance(options['scoring'], dict):
options['refit'] = primary_scoring
if 'pre_dispatch' in options and options['pre_dispatch'] == '':
options['pre_dispatch'] = None
params_builder = params['search_schemes']['search_params_builder']
param_grid = _eval_search_params(params_builder)
estimator = clean_params(estimator)
# save the SearchCV object without fit
if params['save'] == 'save_no_fit':
searcher = optimizer(estimator, param_grid, **options)
print(searcher)
with open(outfile_object, 'wb') as output_handler:
pickle.dump(searcher, output_handler, pickle.HIGHEST_PROTOCOL)
return 0
# read inputs and loads new attributes, like paths
estimator, X, y = _handle_X_y(estimator,
params,
infile1,
infile2,
loaded_df=loaded_df,
ref_seq=ref_seq,
intervals=intervals,
targets=targets,
fasta_path=fasta_path)
# cache iraps_core fits could increase search speed significantly
memory = joblib.Memory(location=CACHE_DIR, verbose=0)
main_est = get_main_estimator(estimator)
if main_est.__class__.__name__ == 'IRAPSClassifier':
main_est.set_params(memory=memory)
searcher = optimizer(estimator, param_grid, **options)
split_mode = params['outer_split'].pop('split_mode')
if split_mode == 'nested_cv':
# make sure refit is choosen
# this could be True for sklearn models, but not the case for
# deep learning models
if not options['refit'] and \
not all(hasattr(estimator, attr)
for attr in ('config', 'model_type')):
warnings.warn("Refit is change to `True` for nested validation!")
setattr(searcher, 'refit', True)
outer_cv, _ = get_cv(params['outer_split']['cv_selector'])
# nested CV, outer cv using cross_validate
if options['error_score'] == 'raise':
rval = cross_validate(
searcher,
X,
y,
scoring=options['scoring'],
cv=outer_cv,
n_jobs=N_JOBS,
verbose=options['verbose'],
return_estimator=(params['save'] == 'save_estimator'),
error_score=options['error_score'],
return_train_score=True)
else:
warnings.simplefilter('always', FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
rval = cross_validate(
searcher,
X,
y,
scoring=options['scoring'],
cv=outer_cv,
n_jobs=N_JOBS,
verbose=options['verbose'],
return_estimator=(params['save'] == 'save_estimator'),
error_score=options['error_score'],
return_train_score=True)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
fitted_searchers = rval.pop('estimator', [])
if fitted_searchers:
import os
pwd = os.getcwd()
save_dir = os.path.join(pwd, 'cv_results_in_folds')
try:
os.mkdir(save_dir)
for idx, obj in enumerate(fitted_searchers):
target_name = 'cv_results_' + '_' + 'split%d' % idx
target_path = os.path.join(pwd, save_dir, target_name)
cv_results_ = getattr(obj, 'cv_results_', None)
if not cv_results_:
print("%s is not available" % target_name)
continue
cv_results_ = pd.DataFrame(cv_results_)
cv_results_ = cv_results_[sorted(cv_results_.columns)]
cv_results_.to_csv(target_path,
sep='\t',
header=True,
index=False)
except Exception as e:
print(e)
finally:
del os
keys = list(rval.keys())
for k in keys:
if k.startswith('test'):
rval['mean_' + k] = np.mean(rval[k])
rval['std_' + k] = np.std(rval[k])
if k.endswith('time'):
rval.pop(k)
rval = pd.DataFrame(rval)
rval = rval[sorted(rval.columns)]
rval.to_csv(path_or_buf=outfile_result,
sep='\t',
header=True,
index=False)
return 0
# deprecate train test split mode
"""searcher = _do_train_test_split_val(
searcher, X, y, params,
primary_scoring=primary_scoring,
error_score=options['error_score'],
groups=groups,
outfile=outfile_result)"""
# no outer split
else:
searcher.set_params(n_jobs=N_JOBS)
if options['error_score'] == 'raise':
searcher.fit(X, y, groups=groups)
else:
warnings.simplefilter('always', FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
searcher.fit(X, y, groups=groups)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
cv_results = pd.DataFrame(searcher.cv_results_)
cv_results = cv_results[sorted(cv_results.columns)]
cv_results.to_csv(path_or_buf=outfile_result,
sep='\t',
header=True,
index=False)
memory.clear(warn=False)
# output best estimator, and weights if applicable
if outfile_object:
best_estimator_ = getattr(searcher, 'best_estimator_', None)
if not best_estimator_:
warnings.warn("GridSearchCV object has no attribute "
"'best_estimator_', because either it's "
"nested gridsearch or `refit` is False!")
return
# clean prams
best_estimator_ = clean_params(best_estimator_)
main_est = get_main_estimator(best_estimator_)
if hasattr(main_est, 'model_') \
and hasattr(main_est, 'save_weights'):
if outfile_weights:
main_est.save_weights(outfile_weights)
del main_est.model_
del main_est.fit_params
del main_est.model_class_
del main_est.validation_data
if getattr(main_est, 'data_generator_', None):
del main_est.data_generator_
with open(outfile_object, 'wb') as output_handler:
print("Best estimator is saved: %s " % repr(best_estimator_))
pickle.dump(best_estimator_, output_handler,
pickle.HIGHEST_PROTOCOL)
def main(inputs_path, output_obj, base_paths=None, meta_path=None):
"""
Parameter
---------
inputs_path : str
File path for Galaxy parameters
output_obj : str
File path for ensemble estimator ouput
base_paths : str
File path or paths concatenated by comma.
meta_path : str
File path
"""
with open(inputs_path, 'r') as param_handler:
params = json.load(param_handler)
estimator_type = params['algo_selection']['estimator_type']
# get base estimators
base_estimators = []
for idx, base_file in enumerate(base_paths.split(',')):
if base_file and base_file != 'None':
model = load_model_from_h5(base_file)
else:
estimator_json = (
params['base_est_builder'][idx]['estimator_selector'])
model = get_estimator(estimator_json)
if estimator_type.startswith('sklearn'):
named = model.__class__.__name__.lower()
named = 'base_%d_%s' % (idx, named)
base_estimators.append((named, model))
else:
base_estimators.append(model)
# get meta estimator, if applicable
if estimator_type.startswith('mlxtend'):
if meta_path:
meta_estimator = load_model_from_h5(meta_path)
else:
estimator_json = (params['algo_selection']['meta_estimator']
['estimator_selector'])
meta_estimator = get_estimator(estimator_json)
options = params['algo_selection']['options']
cv_selector = options.pop('cv_selector', None)
if cv_selector:
if Version(galaxy_ml_version) < Version('0.8.3'):
cv_selector.pop('n_stratification_bins', None)
splitter, groups = get_cv(cv_selector)
options['cv'] = splitter
# set n_jobs
options['n_jobs'] = N_JOBS
weights = options.pop('weights', None)
if weights:
weights = ast.literal_eval(weights)
if weights:
options['weights'] = weights
mod_and_name = estimator_type.split('_')
mod = sys.modules[mod_and_name[0]]
klass = getattr(mod, mod_and_name[1])
if estimator_type.startswith('sklearn'):
options['n_jobs'] = N_JOBS
ensemble_estimator = klass(base_estimators, **options)
elif mod == mlxtend.classifier:
ensemble_estimator = klass(classifiers=base_estimators,
meta_classifier=meta_estimator,
**options)
else:
ensemble_estimator = klass(regressors=base_estimators,
meta_regressor=meta_estimator,
**options)
print(ensemble_estimator)
for base_est in base_estimators:
print(base_est)
dump_model_to_h5(ensemble_estimator, output_obj)
def main(inputs_path,
output_obj,
base_paths=None,
meta_path=None,
outfile_params=None):
"""
Parameter
---------
inputs_path : str
File path for Galaxy parameters
output_obj : str
File path for ensemble estimator ouput
base_paths : str
File path or paths concatenated by comma.
meta_path : str
File path
outfile_params : str
File path for params output
"""
with open(inputs_path, 'r') as param_handler:
params = json.load(param_handler)
estimator_type = params['algo_selection']['estimator_type']
# get base estimators
base_estimators = []
for idx, base_file in enumerate(base_paths.split(',')):
if base_file and base_file != 'None':
with open(base_file, 'rb') as handler:
model = load_model(handler)
else:
estimator_json = (
params['base_est_builder'][idx]['estimator_selector'])
model = get_estimator(estimator_json)
if estimator_type.startswith('sklearn'):
named = model.__class__.__name__.lower()
named = 'base_%d_%s' % (idx, named)
base_estimators.append((named, model))
else:
base_estimators.append(model)
# get meta estimator, if applicable
if estimator_type.startswith('mlxtend'):
if meta_path:
with open(meta_path, 'rb') as f:
meta_estimator = load_model(f)
else:
estimator_json = (params['algo_selection']['meta_estimator']
['estimator_selector'])
meta_estimator = get_estimator(estimator_json)
options = params['algo_selection']['options']
cv_selector = options.pop('cv_selector', None)
if cv_selector:
splitter, groups = get_cv(cv_selector)
options['cv'] = splitter
# set n_jobs
options['n_jobs'] = N_JOBS
weights = options.pop('weights', None)
if weights:
weights = ast.literal_eval(weights)
if weights:
options['weights'] = weights
mod_and_name = estimator_type.split('_')
mod = sys.modules[mod_and_name[0]]
klass = getattr(mod, mod_and_name[1])
if estimator_type.startswith('sklearn'):
options['n_jobs'] = N_JOBS
ensemble_estimator = klass(base_estimators, **options)
elif mod == mlxtend.classifier:
ensemble_estimator = klass(classifiers=base_estimators,
meta_classifier=meta_estimator,
**options)
else:
ensemble_estimator = klass(regressors=base_estimators,
meta_regressor=meta_estimator,
**options)
print(ensemble_estimator)
for base_est in base_estimators:
print(base_est)
with open(output_obj, 'wb') as out_handler:
pickle.dump(ensemble_estimator, out_handler, pickle.HIGHEST_PROTOCOL)
if params['get_params'] and outfile_params:
results = get_search_params(ensemble_estimator)
df = pd.DataFrame(results, columns=['', 'Parameter', 'Value'])
df.to_csv(outfile_params, sep='\t', index=False)
def _get_single_cv_split(params,
array,
infile_labels=None,
infile_groups=None):
""" output (train, test) subset from a cv splitter
Parameters
----------
params : dict
Galaxy tool inputs
array : pandas DataFrame object
The target dataset to split
infile_labels : str
File path to dataset containing target values
infile_groups : str
File path to dataset containing group values
"""
y = None
groups = None
nth_split = params['mode_selection']['nth_split']
# read groups
if infile_groups:
header = 'infer' if (params['mode_selection']['cv_selector']
['groups_selector']['header_g']) else None
column_option = (
params['mode_selection']['cv_selector']['groups_selector']
['column_selector_options_g']['selected_column_selector_option_g'])
if column_option in [
'by_index_number', 'all_but_by_index_number', 'by_header_name',
'all_but_by_header_name'
]:
c = (params['mode_selection']['cv_selector']['groups_selector']
['column_selector_options_g']['col_g'])
else:
c = None
groups = read_columns(infile_groups,
c=c,
c_option=column_option,
sep='\t',
header=header,
parse_dates=True)
groups = groups.ravel()
params['mode_selection']['cv_selector']['groups_selector'] = groups
# read labels
if infile_labels:
target_input = (
params['mode_selection']['cv_selector'].pop('target_input'))
header = 'infer' if target_input['header1'] else None
col_index = target_input['col'][0] - 1
df = pd.read_csv(infile_labels,
sep='\t',
header=header,
parse_dates=True)
y = df.iloc[:, col_index].values
# construct the cv splitter object
splitter, groups = get_cv(params['mode_selection']['cv_selector'])
total_n_splits = splitter.get_n_splits(array.values, y=y, groups=groups)
if nth_split > total_n_splits:
raise ValueError("Total number of splits is {}, but got `nth_split` "
"= {}".format(total_n_splits, nth_split))
i = 1
for train_index, test_index in splitter.split(array.values,
y=y,
groups=groups):
# suppose nth_split >= 1
if i == nth_split:
break
else:
i += 1
train = array.iloc[train_index, :]
test = array.iloc[test_index, :]
return train, test
def main(inputs, infile_estimator, infile1, infile2,
outfile_result, outfile_object=None,
outfile_weights=None, groups=None,
ref_seq=None, intervals=None, targets=None,
fasta_path=None):
"""
Parameter
---------
inputs : str
File path to galaxy tool parameter
infile_estimator : str
File path to estimator
infile1 : str
File path to dataset containing features
infile2 : str
File path to dataset containing target values
outfile_result : str
File path to save the results, either cv_results or test result
outfile_object : str, optional
File path to save searchCV object
outfile_weights : str, optional
File path to save model weights
groups : str
File path to dataset containing groups labels
ref_seq : str
File path to dataset containing genome sequence file
intervals : str
File path to dataset containing interval file
targets : str
File path to dataset compressed target bed file
fasta_path : str
File path to dataset containing fasta file
"""
warnings.simplefilter('ignore')
with open(inputs, 'r') as param_handler:
params = json.load(param_handler)
params_builder = params['search_schemes']['search_params_builder']
with open(infile_estimator, 'rb') as estimator_handler:
estimator = load_model(estimator_handler)
estimator_params = estimator.get_params()
# store read dataframe object
loaded_df = {}
input_type = params['input_options']['selected_input']
# tabular input
if input_type == 'tabular':
header = 'infer' if params['input_options']['header1'] else None
column_option = (params['input_options']['column_selector_options_1']
['selected_column_selector_option'])
if column_option in ['by_index_number', 'all_but_by_index_number',
'by_header_name', 'all_but_by_header_name']:
c = params['input_options']['column_selector_options_1']['col1']
else:
c = None
df_key = infile1 + repr(header)
df = pd.read_csv(infile1, sep='\t', header=header,
parse_dates=True)
loaded_df[df_key] = df
X = read_columns(df, c=c, c_option=column_option).astype(float)
# sparse input
elif input_type == 'sparse':
X = mmread(open(infile1, 'r'))
# fasta_file input
elif input_type == 'seq_fasta':
pyfaidx = get_module('pyfaidx')
sequences = pyfaidx.Fasta(fasta_path)
n_seqs = len(sequences.keys())
X = np.arange(n_seqs)[:, np.newaxis]
for param in estimator_params.keys():
if param.endswith('fasta_path'):
estimator.set_params(
**{param: fasta_path})
break
else:
raise ValueError(
"The selected estimator doesn't support "
"fasta file input! Please consider using "
"KerasGBatchClassifier with "
"FastaDNABatchGenerator/FastaProteinBatchGenerator "
"or having GenomeOneHotEncoder/ProteinOneHotEncoder "
"in pipeline!")
elif input_type == 'refseq_and_interval':
path_params = {
'data_batch_generator__ref_genome_path': ref_seq,
'data_batch_generator__intervals_path': intervals,
'data_batch_generator__target_path': targets
}
estimator.set_params(**path_params)
n_intervals = sum(1 for line in open(intervals))
X = np.arange(n_intervals)[:, np.newaxis]
# Get target y
header = 'infer' if params['input_options']['header2'] else None
column_option = (params['input_options']['column_selector_options_2']
['selected_column_selector_option2'])
if column_option in ['by_index_number', 'all_but_by_index_number',
'by_header_name', 'all_but_by_header_name']:
c = params['input_options']['column_selector_options_2']['col2']
else:
c = None
df_key = infile2 + repr(header)
if df_key in loaded_df:
infile2 = loaded_df[df_key]
else:
infile2 = pd.read_csv(infile2, sep='\t',
header=header, parse_dates=True)
loaded_df[df_key] = infile2
y = read_columns(
infile2,
c=c,
c_option=column_option,
sep='\t',
header=header,
parse_dates=True)
if len(y.shape) == 2 and y.shape[1] == 1:
y = y.ravel()
if input_type == 'refseq_and_interval':
estimator.set_params(
data_batch_generator__features=y.ravel().tolist())
y = None
# end y
optimizer = params['search_schemes']['selected_search_scheme']
optimizer = getattr(model_selection, optimizer)
# handle gridsearchcv options
options = params['search_schemes']['options']
if groups:
header = 'infer' if (options['cv_selector']['groups_selector']
['header_g']) else None
column_option = (options['cv_selector']['groups_selector']
['column_selector_options_g']
['selected_column_selector_option_g'])
if column_option in ['by_index_number', 'all_but_by_index_number',
'by_header_name', 'all_but_by_header_name']:
c = (options['cv_selector']['groups_selector']
['column_selector_options_g']['col_g'])
else:
c = None
df_key = groups + repr(header)
if df_key in loaded_df:
groups = loaded_df[df_key]
groups = read_columns(
groups,
c=c,
c_option=column_option,
sep='\t',
header=header,
parse_dates=True)
groups = groups.ravel()
options['cv_selector']['groups_selector'] = groups
splitter, groups = get_cv(options.pop('cv_selector'))
options['cv'] = splitter
options['n_jobs'] = N_JOBS
primary_scoring = options['scoring']['primary_scoring']
options['scoring'] = get_scoring(options['scoring'])
if options['error_score']:
options['error_score'] = 'raise'
else:
options['error_score'] = np.NaN
if options['refit'] and isinstance(options['scoring'], dict):
options['refit'] = primary_scoring
if 'pre_dispatch' in options and options['pre_dispatch'] == '':
options['pre_dispatch'] = None
# del loaded_df
del loaded_df
# handle memory
memory = joblib.Memory(location=CACHE_DIR, verbose=0)
# cache iraps_core fits could increase search speed significantly
if estimator.__class__.__name__ == 'IRAPSClassifier':
estimator.set_params(memory=memory)
else:
# For iraps buried in pipeline
for p, v in estimator_params.items():
if p.endswith('memory'):
# for case of `__irapsclassifier__memory`
if len(p) > 8 and p[:-8].endswith('irapsclassifier'):
# cache iraps_core fits could increase search
# speed significantly
new_params = {p: memory}
estimator.set_params(**new_params)
# security reason, we don't want memory being
# modified unexpectedly
elif v:
new_params = {p, None}
estimator.set_params(**new_params)
# For now, 1 CPU is suggested for iprasclassifier
elif p.endswith('n_jobs'):
new_params = {p: 1}
estimator.set_params(**new_params)
# for security reason, types of callbacks are limited
elif p.endswith('callbacks'):
for cb in v:
cb_type = cb['callback_selection']['callback_type']
if cb_type not in ALLOWED_CALLBACKS:
raise ValueError(
"Prohibited callback type: %s!" % cb_type)
param_grid = _eval_search_params(params_builder)
searcher = optimizer(estimator, param_grid, **options)
# do nested split
split_mode = params['outer_split'].pop('split_mode')
# nested CV, outer cv using cross_validate
if split_mode == 'nested_cv':
outer_cv, _ = get_cv(params['outer_split']['cv_selector'])
if options['error_score'] == 'raise':
rval = cross_validate(
searcher, X, y, scoring=options['scoring'],
cv=outer_cv, n_jobs=N_JOBS, verbose=0,
error_score=options['error_score'])
else:
warnings.simplefilter('always', FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
rval = cross_validate(
searcher, X, y,
scoring=options['scoring'],
cv=outer_cv, n_jobs=N_JOBS,
verbose=0,
error_score=options['error_score'])
except ValueError:
pass
for warning in w:
print(repr(warning.message))
keys = list(rval.keys())
for k in keys:
if k.startswith('test'):
rval['mean_' + k] = np.mean(rval[k])
rval['std_' + k] = np.std(rval[k])
if k.endswith('time'):
rval.pop(k)
rval = pd.DataFrame(rval)
rval = rval[sorted(rval.columns)]
rval.to_csv(path_or_buf=outfile_result, sep='\t',
header=True, index=False)
else:
if split_mode == 'train_test_split':
train_test_split = try_get_attr(
'galaxy_ml.model_validations', 'train_test_split')
# make sure refit is choosen
# this could be True for sklearn models, but not the case for
# deep learning models
if not options['refit'] and \
not all(hasattr(estimator, attr)
for attr in ('config', 'model_type')):
warnings.warn("Refit is change to `True` for nested "
"validation!")
setattr(searcher, 'refit', True)
split_options = params['outer_split']
# splits
if split_options['shuffle'] == 'stratified':
split_options['labels'] = y
X, X_test, y, y_test = train_test_split(X, y, **split_options)
elif split_options['shuffle'] == 'group':
if groups is None:
raise ValueError("No group based CV option was "
"choosen for group shuffle!")
split_options['labels'] = groups
if y is None:
X, X_test, groups, _ =\
train_test_split(X, groups, **split_options)
else:
X, X_test, y, y_test, groups, _ =\
train_test_split(X, y, groups, **split_options)
else:
if split_options['shuffle'] == 'None':
split_options['shuffle'] = None
X, X_test, y, y_test =\
train_test_split(X, y, **split_options)
# end train_test_split
# shared by both train_test_split and non-split
if options['error_score'] == 'raise':
searcher.fit(X, y, groups=groups)
else:
warnings.simplefilter('always', FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
searcher.fit(X, y, groups=groups)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
# no outer split
if split_mode == 'no':
# save results
cv_results = pd.DataFrame(searcher.cv_results_)
cv_results = cv_results[sorted(cv_results.columns)]
cv_results.to_csv(path_or_buf=outfile_result, sep='\t',
header=True, index=False)
# train_test_split, output test result using best_estimator_
# or rebuild the trained estimator using weights if applicable.
else:
scorer_ = searcher.scorer_
if isinstance(scorer_, collections.Mapping):
is_multimetric = True
else:
is_multimetric = False
best_estimator_ = getattr(searcher, 'best_estimator_', None)
if not best_estimator_:
raise ValueError("GridSearchCV object has no "
"`best_estimator_` when `refit`=False!")
if best_estimator_.__class__.__name__ == 'KerasGBatchClassifier' \
and hasattr(estimator.data_batch_generator, 'target_path'):
test_score = best_estimator_.evaluate(
X_test, scorer=scorer_, is_multimetric=is_multimetric)
else:
test_score = _score(best_estimator_, X_test,
y_test, scorer_,
is_multimetric=is_multimetric)
if not is_multimetric:
test_score = {primary_scoring: test_score}
for key, value in test_score.items():
test_score[key] = [value]
result_df = pd.DataFrame(test_score)
result_df.to_csv(path_or_buf=outfile_result, sep='\t',
header=True, index=False)
memory.clear(warn=False)
if outfile_object:
best_estimator_ = getattr(searcher, 'best_estimator_', None)
if not best_estimator_:
warnings.warn("GridSearchCV object has no attribute "
"'best_estimator_', because either it's "
"nested gridsearch or `refit` is False!")
return
main_est = best_estimator_
if isinstance(best_estimator_, pipeline.Pipeline):
main_est = best_estimator_.steps[-1][-1]
if hasattr(main_est, 'model_') \
and hasattr(main_est, 'save_weights'):
if outfile_weights:
main_est.save_weights(outfile_weights)
del main_est.model_
del main_est.fit_params
del main_est.model_class_
del main_est.validation_data
if getattr(main_est, 'data_generator_', None):
del main_est.data_generator_
del main_est.data_batch_generator
with open(outfile_object, 'wb') as output_handler:
pickle.dump(best_estimator_, output_handler,
pickle.HIGHEST_PROTOCOL)
def main(
inputs,
infile_estimator,
infile1,
infile2,
outfile_result,
outfile_object=None,
outfile_weights=None,
groups=None,
ref_seq=None,
intervals=None,
targets=None,
fasta_path=None,
):
"""
Parameter
---------
inputs : str
File path to galaxy tool parameter
infile_estimator : str
File path to estimator
infile1 : str
File path to dataset containing features
infile2 : str
File path to dataset containing target values
outfile_result : str
File path to save the results, either cv_results or test result
outfile_object : str, optional
File path to save searchCV object
outfile_weights : str, optional
File path to save model weights
groups : str
File path to dataset containing groups labels
ref_seq : str
File path to dataset containing genome sequence file
intervals : str
File path to dataset containing interval file
targets : str
File path to dataset compressed target bed file
fasta_path : str
File path to dataset containing fasta file
"""
warnings.simplefilter("ignore")
# store read dataframe object
loaded_df = {}
with open(inputs, "r") as param_handler:
params = json.load(param_handler)
# Override the refit parameter
params["search_schemes"]["options"]["refit"] = (
True if params["save"] != "nope" else False
)
with open(infile_estimator, "rb") as estimator_handler:
estimator = load_model(estimator_handler)
optimizer = params["search_schemes"]["selected_search_scheme"]
optimizer = getattr(model_selection, optimizer)
# handle gridsearchcv options
options = params["search_schemes"]["options"]
if groups:
header = (
"infer" if (options["cv_selector"]["groups_selector"]["header_g"]) else None
)
column_option = options["cv_selector"]["groups_selector"][
"column_selector_options_g"
]["selected_column_selector_option_g"]
if column_option in [
"by_index_number",
"all_but_by_index_number",
"by_header_name",
"all_but_by_header_name",
]:
c = options["cv_selector"]["groups_selector"]["column_selector_options_g"][
"col_g"
]
else:
c = None
df_key = groups + repr(header)
groups = pd.read_csv(groups, sep="\t", header=header, parse_dates=True)
loaded_df[df_key] = groups
groups = read_columns(
groups,
c=c,
c_option=column_option,
sep="\t",
header=header,
parse_dates=True,
)
groups = groups.ravel()
options["cv_selector"]["groups_selector"] = groups
splitter, groups = get_cv(options.pop("cv_selector"))
options["cv"] = splitter
primary_scoring = options["scoring"]["primary_scoring"]
# get_scoring() expects secondary_scoring to be a comma separated string (not a list)
# Check if secondary_scoring is specified
secondary_scoring = options["scoring"].get("secondary_scoring", None)
if secondary_scoring is not None:
# If secondary_scoring is specified, convert the list into comman separated string
options["scoring"]["secondary_scoring"] = ",".join(
options["scoring"]["secondary_scoring"]
)
options["scoring"] = get_scoring(options["scoring"])
if options["error_score"]:
options["error_score"] = "raise"
else:
options["error_score"] = np.nan
if options["refit"] and isinstance(options["scoring"], dict):
options["refit"] = primary_scoring
if "pre_dispatch" in options and options["pre_dispatch"] == "":
options["pre_dispatch"] = None
params_builder = params["search_schemes"]["search_params_builder"]
param_grid = _eval_search_params(params_builder)
estimator = clean_params(estimator)
# save the SearchCV object without fit
if params["save"] == "save_no_fit":
searcher = optimizer(estimator, param_grid, **options)
print(searcher)
with open(outfile_object, "wb") as output_handler:
pickle.dump(searcher, output_handler, pickle.HIGHEST_PROTOCOL)
return 0
# read inputs and loads new attributes, like paths
estimator, X, y = _handle_X_y(
estimator,
params,
infile1,
infile2,
loaded_df=loaded_df,
ref_seq=ref_seq,
intervals=intervals,
targets=targets,
fasta_path=fasta_path,
)
# cache iraps_core fits could increase search speed significantly
memory = joblib.Memory(location=CACHE_DIR, verbose=0)
main_est = get_main_estimator(estimator)
if main_est.__class__.__name__ == "IRAPSClassifier":
main_est.set_params(memory=memory)
searcher = optimizer(estimator, param_grid, **options)
split_mode = params["outer_split"].pop("split_mode")
if split_mode == "nested_cv":
# make sure refit is choosen
# this could be True for sklearn models, but not the case for
# deep learning models
if not options["refit"] and not all(
hasattr(estimator, attr) for attr in ("config", "model_type")
):
warnings.warn("Refit is change to `True` for nested validation!")
setattr(searcher, "refit", True)
outer_cv, _ = get_cv(params["outer_split"]["cv_selector"])
# nested CV, outer cv using cross_validate
if options["error_score"] == "raise":
rval = cross_validate(
searcher,
X,
y,
scoring=options["scoring"],
cv=outer_cv,
n_jobs=N_JOBS,
verbose=options["verbose"],
return_estimator=(params["save"] == "save_estimator"),
error_score=options["error_score"],
return_train_score=True,
)
else:
warnings.simplefilter("always", FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
rval = cross_validate(
searcher,
X,
y,
scoring=options["scoring"],
cv=outer_cv,
n_jobs=N_JOBS,
verbose=options["verbose"],
return_estimator=(params["save"] == "save_estimator"),
error_score=options["error_score"],
return_train_score=True,
)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
fitted_searchers = rval.pop("estimator", [])
if fitted_searchers:
import os
pwd = os.getcwd()
save_dir = os.path.join(pwd, "cv_results_in_folds")
try:
os.mkdir(save_dir)
for idx, obj in enumerate(fitted_searchers):
target_name = "cv_results_" + "_" + "split%d" % idx
target_path = os.path.join(pwd, save_dir, target_name)
cv_results_ = getattr(obj, "cv_results_", None)
if not cv_results_:
print("%s is not available" % target_name)
continue
cv_results_ = pd.DataFrame(cv_results_)
cv_results_ = cv_results_[sorted(cv_results_.columns)]
cv_results_.to_csv(target_path, sep="\t", header=True, index=False)
except Exception as e:
print(e)
finally:
del os
keys = list(rval.keys())
for k in keys:
if k.startswith("test"):
rval["mean_" + k] = np.mean(rval[k])
rval["std_" + k] = np.std(rval[k])
if k.endswith("time"):
rval.pop(k)
rval = pd.DataFrame(rval)
rval = rval[sorted(rval.columns)]
rval.to_csv(path_or_buf=outfile_result, sep="\t", header=True, index=False)
# deprecate train test split mode
"""searcher = _do_train_test_split_val(
searcher, X, y, params,
primary_scoring=primary_scoring,
error_score=options['error_score'],
groups=groups,
outfile=outfile_result)"""
return 0
# no outer split
else:
searcher.set_params(n_jobs=N_JOBS)
if options["error_score"] == "raise":
searcher.fit(X, y, groups=groups)
else:
warnings.simplefilter("always", FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
searcher.fit(X, y, groups=groups)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
cv_results = pd.DataFrame(searcher.cv_results_)
cv_results = cv_results[sorted(cv_results.columns)]
cv_results.to_csv(
path_or_buf=outfile_result, sep="\t", header=True, index=False
)
memory.clear(warn=False)
# output best estimator, and weights if applicable
if outfile_object:
best_estimator_ = getattr(searcher, "best_estimator_", None)
if not best_estimator_:
warnings.warn(
"GridSearchCV object has no attribute "
"'best_estimator_', because either it's "
"nested gridsearch or `refit` is False!"
)
return
# clean prams
best_estimator_ = clean_params(best_estimator_)
main_est = get_main_estimator(best_estimator_)
if hasattr(main_est, "model_") and hasattr(main_est, "save_weights"):
if outfile_weights:
main_est.save_weights(outfile_weights)
del main_est.model_
del main_est.fit_params
del main_est.model_class_
del main_est.validation_data
if getattr(main_est, "data_generator_", None):
del main_est.data_generator_
with open(outfile_object, "wb") as output_handler:
print("Best estimator is saved: %s " % repr(best_estimator_))
pickle.dump(best_estimator_, output_handler, pickle.HIGHEST_PROTOCOL)
def main(inputs_path,
output_obj,
base_paths=None,
meta_path=None,
outfile_params=None):
"""
Parameter
---------
inputs_path : str
File path for Galaxy parameters
output_obj : str
File path for ensemble estimator ouput
base_paths : str
File path or paths concatenated by comma.
meta_path : str
File path
outfile_params : str
File path for params output
"""
with open(inputs_path, "r") as param_handler:
params = json.load(param_handler)
estimator_type = params["algo_selection"]["estimator_type"]
# get base estimators
base_estimators = []
for idx, base_file in enumerate(base_paths.split(",")):
if base_file and base_file != "None":
with open(base_file, "rb") as handler:
model = load_model(handler)
else:
estimator_json = params["base_est_builder"][idx][
"estimator_selector"]
model = get_estimator(estimator_json)
if estimator_type.startswith("sklearn"):
named = model.__class__.__name__.lower()
named = "base_%d_%s" % (idx, named)
base_estimators.append((named, model))
else:
base_estimators.append(model)
# get meta estimator, if applicable
if estimator_type.startswith("mlxtend"):
if meta_path:
with open(meta_path, "rb") as f:
meta_estimator = load_model(f)
else:
estimator_json = params["algo_selection"]["meta_estimator"][
"estimator_selector"]
meta_estimator = get_estimator(estimator_json)
options = params["algo_selection"]["options"]
cv_selector = options.pop("cv_selector", None)
if cv_selector:
splitter, _groups = get_cv(cv_selector)
options["cv"] = splitter
# set n_jobs
options["n_jobs"] = N_JOBS
weights = options.pop("weights", None)
if weights:
weights = ast.literal_eval(weights)
if weights:
options["weights"] = weights
mod_and_name = estimator_type.split("_")
mod = sys.modules[mod_and_name[0]]
klass = getattr(mod, mod_and_name[1])
if estimator_type.startswith("sklearn"):
options["n_jobs"] = N_JOBS
ensemble_estimator = klass(base_estimators, **options)
elif mod == mlxtend.classifier:
ensemble_estimator = klass(classifiers=base_estimators,
meta_classifier=meta_estimator,
**options)
else:
ensemble_estimator = klass(regressors=base_estimators,
meta_regressor=meta_estimator,
**options)
print(ensemble_estimator)
for base_est in base_estimators:
print(base_est)
with open(output_obj, "wb") as out_handler:
pickle.dump(ensemble_estimator, out_handler, pickle.HIGHEST_PROTOCOL)
if params["get_params"] and outfile_params:
results = get_search_params(ensemble_estimator)
df = pd.DataFrame(results, columns=["", "Parameter", "Value"])
df.to_csv(outfile_params, sep="\t", index=False)
def main(inputs,
infile_estimator,
infile1,
infile2,
outfile_result,
outfile_object=None,
groups=None,
ref_seq=None,
intervals=None,
targets=None,
fasta_path=None):
"""
Parameter
---------
inputs : str
File path to galaxy tool parameter.
infile_estimator : str
File path to estimator.
infile1 : str
File path to dataset containing features
infile2 : str
File path to dataset containing target values
outfile_result : str
File path to save the results, either cv_results or test result
outfile_object : str, optional
File path to save searchCV object
groups : str
File path to dataset containing groups labels
ref_seq : str
File path to dataset containing genome sequence file
intervals : str
File path to dataset containing interval file
targets : str
File path to dataset compressed target bed file
fasta_path : str
File path to dataset containing fasta file
"""
warnings.simplefilter('ignore')
# store read dataframe object
loaded_df = {}
with open(inputs, 'r') as param_handler:
params = json.load(param_handler)
# Override the refit parameter
params['search_schemes']['options']['refit'] = True \
if (params['save'] != 'nope' or
params['outer_split']['split_mode'] == 'nested_cv') else False
estimator = load_model_from_h5(infile_estimator)
estimator = clean_params(estimator)
if estimator.__class__.__name__ == 'KerasGBatchClassifier':
_fit_and_score = try_get_attr('galaxy_ml.model_validations',
'_fit_and_score')
setattr(_search, '_fit_and_score', _fit_and_score)
setattr(_validation, '_fit_and_score', _fit_and_score)
optimizer = params['search_schemes']['selected_search_scheme']
if optimizer == 'skopt.BayesSearchCV':
optimizer = BayesSearchCV
else:
optimizer = getattr(model_selection, optimizer)
# handle gridsearchcv options
options = params['search_schemes']['options']
if groups:
header = 'infer' if (
options['cv_selector']['groups_selector']['header_g']) else None
column_option = (
options['cv_selector']['groups_selector']
['column_selector_options_g']['selected_column_selector_option_g'])
if column_option in [
'by_index_number', 'all_but_by_index_number', 'by_header_name',
'all_but_by_header_name'
]:
c = (options['cv_selector']['groups_selector']
['column_selector_options_g']['col_g'])
else:
c = None
df_key = groups + repr(header)
groups = pd.read_csv(groups, sep='\t', header=header, parse_dates=True)
loaded_df[df_key] = groups
groups = read_columns(groups,
c=c,
c_option=column_option,
sep='\t',
header=header,
parse_dates=True)
groups = groups.ravel()
options['cv_selector']['groups_selector'] = groups
cv_selector = options.pop('cv_selector')
if Version(galaxy_ml_version) < Version('0.8.3'):
cv_selector.pop('n_stratification_bins', None)
splitter, groups = get_cv(cv_selector)
options['cv'] = splitter
primary_scoring = options['scoring']['primary_scoring']
options['scoring'] = get_scoring(options['scoring'])
# TODO make BayesSearchCV support multiple scoring
if optimizer == 'skopt.BayesSearchCV' and \
isinstance(options['scoring'], dict):
options['scoring'] = options['scoring'][primary_scoring]
warnings.warn("BayesSearchCV doesn't support multiple "
"scorings! Primary scoring is used.")
if options['error_score']:
options['error_score'] = 'raise'
else:
options['error_score'] = np.NaN
if options['refit'] and isinstance(options['scoring'], dict):
options['refit'] = primary_scoring
if 'pre_dispatch' in options and options['pre_dispatch'] == '':
options['pre_dispatch'] = None
params_builder = params['search_schemes']['search_params_builder']
param_grid = _eval_search_params(params_builder)
# save the SearchCV object without fit
if params['save'] == 'save_no_fit':
searcher = optimizer(estimator, param_grid, **options)
dump_model_to_h5(searcher, outfile_object)
return 0
# read inputs and loads new attributes, like paths
estimator, X, y = _handle_X_y(estimator,
params,
infile1,
infile2,
loaded_df=loaded_df,
ref_seq=ref_seq,
intervals=intervals,
targets=targets,
fasta_path=fasta_path)
# cache iraps_core fits could increase search speed significantly
memory = joblib.Memory(location=CACHE_DIR, verbose=0)
estimator = _set_memory(estimator, memory)
searcher = optimizer(estimator, param_grid, **options)
split_mode = params['outer_split'].pop('split_mode')
# Nested CV
if split_mode == 'nested_cv':
cv_selector = params['outer_split']['cv_selector']
if Version(galaxy_ml_version) < Version('0.8.3'):
cv_selector.pop('n_stratification_bins', None)
outer_cv, _ = get_cv(cv_selector)
# nested CV, outer cv using cross_validate
if options['error_score'] == 'raise':
rval = cross_validate(
searcher,
X,
y,
groups=groups,
scoring=options['scoring'],
cv=outer_cv,
n_jobs=N_JOBS,
verbose=options['verbose'],
fit_params={'groups': groups},
return_estimator=(params['save'] == 'save_estimator'),
error_score=options['error_score'],
return_train_score=True)
else:
warnings.simplefilter('always', FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
rval = cross_validate(
searcher,
X,
y,
groups=groups,
scoring=options['scoring'],
cv=outer_cv,
n_jobs=N_JOBS,
verbose=options['verbose'],
fit_params={'groups': groups},
return_estimator=(params['save'] == 'save_estimator'),
error_score=options['error_score'],
return_train_score=True)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
fitted_searchers = rval.pop('estimator', [])
if fitted_searchers:
import os
pwd = os.getcwd()
save_dir = os.path.join(pwd, 'cv_results_in_folds')
try:
os.mkdir(save_dir)
for idx, obj in enumerate(fitted_searchers):
target_name = 'cv_results_' + '_' + 'split%d' % idx
target_path = os.path.join(pwd, save_dir, target_name)
cv_results_ = getattr(obj, 'cv_results_', None)
if not cv_results_:
print("%s is not available" % target_name)
continue
cv_results_ = pd.DataFrame(cv_results_)
cv_results_ = cv_results_[sorted(cv_results_.columns)]
cv_results_.to_csv(target_path,
sep='\t',
header=True,
index=False)
except Exception as e:
print(e)
finally:
del os
keys = list(rval.keys())
for k in keys:
if k.startswith('test'):
rval['mean_' + k] = np.mean(rval[k])
rval['std_' + k] = np.std(rval[k])
if k.endswith('time'):
rval.pop(k)
rval = pd.DataFrame(rval)
rval = rval[sorted(rval.columns)]
rval.to_csv(path_or_buf=outfile_result,
sep='\t',
header=True,
index=False)
return 0
# deprecate train test split mode
"""searcher = _do_train_test_split_val(
searcher, X, y, params,
primary_scoring=primary_scoring,
error_score=options['error_score'],
groups=groups,
outfile=outfile_result)"""
# no outer split
else:
searcher.set_params(n_jobs=N_JOBS)
if options['error_score'] == 'raise':
searcher.fit(X, y, groups=groups)
else:
warnings.simplefilter('always', FitFailedWarning)
with warnings.catch_warnings(record=True) as w:
try:
searcher.fit(X, y, groups=groups)
except ValueError:
pass
for warning in w:
print(repr(warning.message))
cv_results = pd.DataFrame(searcher.cv_results_)
cv_results = cv_results[sorted(cv_results.columns)]
cv_results.to_csv(path_or_buf=outfile_result,
sep='\t',
header=True,
index=False)
memory.clear(warn=False)
# output best estimator, and weights if applicable
if outfile_object:
best_estimator_ = getattr(searcher, 'best_estimator_', None)
if not best_estimator_:
warnings.warn("GridSearchCV object has no attribute "
"'best_estimator_', because either it's "
"nested gridsearch or `refit` is False!")
return
print("Saving best estimator: %s " % repr(best_estimator_))
dump_model_to_h5(best_estimator_, outfile_object)
