def test_keys_with_list_of_values():
# No exception in creating and executing model with a key/list pair
model = vw(quiet=True, q=["fa", "fb"])
model.learn('1 | a b c')
prediction = model.predict(' | a b c')
assert isinstance(prediction, float)
del model
def initialize(self, test, resume=False):
if self.model_class == 'lookup':
self.actor_model = {}
elif self.model_class == 'vw_python':
self.actor_model_path = self.base_folder_name + "/model.vw"
if not test:
if not resume:
self.actor_model = pyvw.vw(quiet=True, l2=self.params['l2'], loss_function=self.params['loss_function'], holdout_off=True,
f=self.actor_model_path, b=self.params['b'], lrq=self.params['lrq'], l=self.params['l'], k=True)
else:
self.actor_model = pyvw.vw("--quiet -f {0} -i {0}".format(self.actor_model_path))
else:
self.actor_model = pyvw.vw("--quiet -t -i {0}".format(self.actor_model_path))
def test_multilabel_prediction_type():
model = vw(multilabel_oaa=4, quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pMULTILABELS
prediction = model.predict(' | a b c')
assert isinstance(prediction, list)
del model
def test_scalar_prediction_type():
model = vw(quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pSCALAR
prediction = model.predict(' | a b c')
assert isinstance(prediction, float)
del model
def test_prob_prediction_type():
model = vw(loss_function='logistic', csoaa_ldf='mc', probabilities=True, quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pPROB
prediction = model.predict(' | a b c')
assert isinstance(prediction, float)
del model
def test_action_probs_prediction_type():
model = vw(cb_explore=2, ngram=2, quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pACTION_PROBS
prediction = model.predict(' | a b c')
assert isinstance(prediction, list)
del model
def test_action_scores_prediction_type():
model = vw(loss_function='logistic', csoaa_ldf='m', quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pMULTICLASS
prediction = model.predict(' | a b c')
assert isinstance(prediction, int)
del model
def save_and_continue(self, thread_id, event):
if self.epochs % 1000.0 == 0 and thread_id == 1:
event.clear()
print "saving model..."
print "epochs: " + str(self.epochs)
self.actor_model.finish()
self.actor_model = pyvw.vw("--quiet --save_resume -f {0} -i {1}".format(self.actor_model_path, self.actor_model_path))
event.set()
def test_multiclass_prediction_type():
n = 3
model = vw(loss_function='logistic', oaa=n, quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pMULTICLASS
prediction = model.predict(' | a b c')
assert isinstance(prediction, int)
del model
def test_action_scores_prediction_type():
model = vw(loss_function="logistic", csoaa_ldf="m", quiet=True)
multi_ex = [model.example("1:1 | a b c"), model.example("2:-1 | a b c")]
model.learn(multi_ex)
assert model.get_prediction_type() == model.pMULTICLASS
multi_ex = [model.example("1 | a b c"), model.example("2 | a b c")]
prediction = model.predict(multi_ex)
assert isinstance(prediction, int)
del model
def test_scalars_prediction_type():
n = 3
model = vw(loss_function='logistic', oaa=n, probabilities=True, quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pSCALARS
prediction = model.predict(' | a b c')
assert isinstance(prediction, list)
assert len(prediction) == n
del model
def test_cost_sensitive_label():
model = vw(csoaa=4, quiet=True)
csl = pyvw.cost_sensitive_label(model.example('2:5 |'))
assert csl.costs[0].label == 2
assert csl.costs[0].wap_value == 0.0
assert csl.costs[0].partial_prediction == 0.0
assert csl.costs[0].cost == 5.0
assert str(csl) == '2:5.0'
del model
def test_cbandits_label():
model = vw(cb=4, quiet=True)
cbl = pyvw.cbandits_label(model.example('1:10:0.5 |'))
assert cbl.costs[0].action == 1
assert cbl.costs[0].probability == 0.5
assert cbl.costs[0].partial_prediction == 0
assert cbl.costs[0].cost == 10.0
assert str(cbl) == '1:10.0:0.5'
del model
def test_prob_prediction_type():
model = vw(loss_function='logistic', csoaa_ldf='mc', probabilities=True, quiet=True)
multi_ex = [model.example('1:0.2 | a b c'), model.example('2:0.8 | a b c')]
model.learn(multi_ex)
assert model.get_prediction_type() == model.pPROB
multi_ex = [model.example('1 | a b c'), model.example('2 | a b c')]
prediction = model.predict(multi_ex)
assert isinstance(prediction, float)
del model
def test_multiclass_label_example():
n = 4
model = pyvw.vw(loss_function="logistic", oaa=n, quiet=True)
ex = model.example("1 | a b c d", 2)
ml2 = pyvw.multiclass_label(ex)
assert ml2.label == 1
assert ml2.weight == 1.0
assert ml2.prediction == 0
assert str(ml2) == "1"
def test_action_scores_prediction_type():
model = vw(loss_function='logistic', csoaa_ldf='m', quiet=True)
multi_ex = [model.example('1:1 | a b c'), model.example('2:-1 | a b c')]
model.learn(multi_ex)
assert model.get_prediction_type() == model.pMULTICLASS
multi_ex = [model.example('1 | a b c'), model.example('2 | a b c')]
prediction = model.predict(multi_ex)
assert isinstance(prediction, int)
del model
def test_simple_label_example():
vw_ex = vw(quiet=True)
ex = vw_ex.example("1 |a two features |b more features here")
sl2 = pyvw.simple_label(ex)
assert sl2.label == 1.0
assert sl2.weight == 1.0
assert sl2.prediction == 0.0
assert sl2.initial == 0.0
assert str(sl2) == "1.0"
def test_scalars_prediction_type():
n = 3
model = vw(loss_function='logistic', oaa=n, probabilities=True, quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pSCALARS
prediction = model.predict(' | a b c')
assert isinstance(prediction, list)
assert len(prediction) == n
del model
def train_lr(args):
logger.info("Reading data")
df = pd.read_csv(args.input, names=['query', 'category'])
logger.info("Lemmatizing and preparing data")
df['query_lem'] = df['query'].apply(lemmatize)
# ensure that category start from 1
df.category = df.category + 1
df['vw_train'] = df.category.astype(str) + ' | ' + df['query_lem'].values
df['vw_test'] = '| ' + df['query_lem'].values
category_count = len(df.category.unique())
df_train, df_test = train_test_split(df,
test_size=0.2,
stratify=df.category.values,
random_state=42)
train_examples = list(df_train['vw_train'].values)
test_examples = list(df_test['vw_train'].values)
logger.info("Training LR model")
vw_command = "--oaa {} --random_seed 17 --cache_file ./tmp1 -b 27 -f ./models/lr.vw ".format(
category_count)
logger.info(vw_command)
vw = pyvw.vw(vw_command)
for iteration in range(2):
logger.info("Iteration %s", iteration)
for i in range(len(train_examples)):
vw.learn(train_examples[i])
vw.finish()
logger.info("Finished model training")
logger.info("Calculating accuracy and F1 score on hold out data set")
vw = pyvw.vw("-i ./models/lr.vw -t")
pred = [vw.predict(sample) for sample in test_examples]
logger.info("LR holdout accuracy score is %s",
np.round(accuracy_score(df_test.category.values, pred), 2))
logger.info(
"LR holdout F1 score is %s",
np.round(f1_score(df_test.category.values, pred, average='weighted'),
2))
def _vw_run(args, data, predict_and_yield):
vw = pyvw.vw(" ".join(args))
log.info("Running: vw " + " ".join(args))
for d in data:
ex = vw.example((d.label or b"") + b" | " + d.features + b"\n")
if predict_and_yield:
yield vw.predict(ex, pylibvw.vw.lMulticlass), d.tag
else:
vw.learn(ex)
vw.finish()
def test_prob_prediction_type():
model = vw(loss_function='logistic',
csoaa_ldf='mc',
probabilities=True,
quiet=True)
model.learn('1 | a b c')
assert model.get_prediction_type() == model.pPROB
prediction = model.predict(' | a b c')
assert isinstance(prediction, float)
del model
def _test_helper_save_load(vw_arg: str, num_iterations=2000, seed=10, has_automl=False, log_filename=None):
split = 1500
before_save = num_iterations-split
first_vw = pyvw.vw(arg_str=vw_arg)
has_automl = "automl" in first_vw.get_enabled_reductions()
sim = Simulator(seed=seed, has_automl=has_automl, debug_logfile=log_filename)
# first chunk
ctr = sim.run_simulation(first_vw, before_save, sim.users, sim.times_of_day, sim.actions, sim.get_cost)
# save
model_file = "test_save_load.vw"
first_vw.save(model_file)
first_vw.finish()
# reload in another instance
other_vw = pyvw.vw(f"-i {model_file} {vw_arg}") # todo remove vw_arg from here
# continue
ctr = sim.run_simulation(other_vw, split, sim.users, sim.times_of_day, sim.actions, sim.get_cost, shift=before_save+1)
return ctr
def _vw_run(args, data, predict_and_yield):
vw = pyvw.vw(' '.join(args))
util.log.info('Running: vw ' + ' '.join(args))
for d in data:
ex = vw.example((d.label or b'') + b' | ' + d.features + b'\n')
if predict_and_yield:
yield vw.predict(ex, pylibvw.vw.lMulticlass), d.tag
else:
vw.learn(ex)
vw.finish()
def test_ccb_single_slot_and_cb_equivalence_no_slot_features():
# --- CCB
ccb_model_file_name = "model_file_ccb_equiv.txt"
ccb_workspace = pyvw.vw(quiet=True,
ccb_explore_adf=True,
readable_model=ccb_model_file_name)
ccb_ex = """
ccb shared |User b
ccb action |Action d
ccb action |Action e
ccb action |Action f
ccb action |Action ff
ccb action |Action fff
ccb slot 4:1:0.2 |
"""
ccb_workspace.learn(ccb_ex)
ccb_workspace.finish()
ccb_num_weights = count_weights_from_readable_model_file_for_equiv_test(
ccb_model_file_name)
# --- CB
cb_model_file_name = "model_file_cb_equiv.txt"
cb_workspace = pyvw.vw(quiet=True,
cb_explore_adf=True,
readable_model=cb_model_file_name)
cb_ex = """
shared |User b
|Action d
|Action e
|Action f
|Action ff
4:1:0.2 |Action fff
"""
cb_workspace.learn(cb_ex)
cb_workspace.finish()
cb_num_weights = count_weights_from_readable_model_file_for_equiv_test(
cb_model_file_name)
assert ccb_num_weights == cb_num_weights
def get_vw(self):
"""Factory to create a vw instance on demand
Returns
-------
pyvw.vw instance
"""
if self.vw_ is None:
self.vw_ = pyvw.vw(**self.params)
return self.vw_
def test_get_weight_name():
model = vw(quiet=True)
model.learn("1 | a a b c |ns x")
assert model.get_weight_from_name("a") != 0.
assert model.get_weight_from_name("b") != 0.
assert model.get_weight_from_name("b") == model.get_weight_from_name("c")
assert model.get_weight_from_name("a") != model.get_weight_from_name("b")
assert model.get_weight_from_name("x") == 0.
assert model.get_weight_from_name("x", "ns") != 0.
assert model.get_weight_from_name("x",
"ns") == model.get_weight_from_name("b")
def test_multiclass_probabilities_label():
n = 4
model = pyvw.vw(
loss_function="logistic", oaa=n, probabilities=True, quiet=True
)
ex = model.example("1 | a b c d", 2)
model.learn(ex)
mpl = pyvw.multiclass_probabilities_label(ex)
assert str(mpl) == "1:0.25 2:0.25 3:0.25 4:0.25"
mpl = pyvw.multiclass_probabilities_label([1, 2, 3], [0.4, 0.3, 0.3])
assert str(mpl) == "1:0.4 2:0.3 3:0.3"
def get_vw(self):
"""Factory to create a vw instance on demand
Returns
-------
pyvw.vw instance
"""
if self.vw_ is None:
self.vw_ = pyvw.vw(**self.params)
return self.vw_
def test_vw_config_manager():
expected_set = {'--quiet', '--loss_function logistic', '--save_resume', '--data /root/vowpal_wabbit/test/train-sets/rcv1_small.dat'}
vw = pyvw.vw(arg_str="--save_resume --loss_function logistic -d /root/vowpal_wabbit/test/train-sets/rcv1_small.dat --quiet")
config = vw.get_config()
cmd_str_list = helper_options_to_list_strings(config)
assert set(cmd_str_list) == expected_set
vw.finish()
# do another iteration generating the cmd string from the output of previous
new_args = " ".join(cmd_str_list)
other_vw = pyvw.vw(new_args)
new_config = vw.get_config()
new_cmd_str_list = helper_options_to_list_strings(new_config)
assert set(new_cmd_str_list) == expected_set
other_vw.finish()
def load(self, verify_on_load=True):
"""
loads model file into memory (as a vw sub-process)
verify model first, then stop process if status is not active
Args:
verify_on_load (bool): flag to call verify when loading a model
"""
self.process = pyvw.vw(self.command)
super(self.__class__, self).load(verify_on_load=verify_on_load)
def __init__(self, horizon, num_actions, policy, default_model="--power_t 0.0 -q la --quiet"):
"""
Initialize variables to store basic information of MDP
and every Q model needed for each step.
Params:
default_model: a default VW model to learn Q. You can try different settings to get the best model.
"""
super().__init__(horizon, num_actions, policy)
# We assume that each step is indexed from 1 to H (horizon)
self.models = [pyvw.vw(default_model) for _ in range(self.horizon)]
def _create_model(self, project, initial_params={}):
initial_params = initial_params.copy() # don't mutate the original
trainpath = os.path.join(self.datadir, self.TRAIN_FILE)
initial_params['data'] = trainpath
params = self._create_params(initial_params)
if params.get('passes', 1) > 1:
# need a cache file when there are multiple passes
params.update({'cache': True, 'kill_cache': True})
self.debug("model parameters: {}".format(params))
self._model = pyvw.vw(**params)
modelpath = os.path.join(self.datadir, self.MODEL_FILE)
self._model.save(modelpath)
def test_vw_oml_problem_and_vanilla_vw(self):
vw_oml_problem_args, vw_online_aml_problem = get_vw_tuning_problem()
vanilla_vw = pyvw.vw(**vw_oml_problem_args["fixed_hp_config"])
cumulative_loss_list = online_learning_loop(
vw_online_aml_problem.max_iter_num,
vw_online_aml_problem.vw_examples,
vanilla_vw,
loss_func=vw_oml_problem_args["fixed_hp_config"].get(
"loss_function", "squared"),
)
print("final average loss:",
sum(cumulative_loss_list) / len(cumulative_loss_list))
def _create_bandit(self, num_actions, seed=None):
# --epsilon: Epsilon-Greedy exploration
# --cover: Online Cover exploration
# --nn N: use sigmoidal feedforward network w/ N hidden units
from vowpalwabbit import pyvw
cmd = "--nn 16 --epsilon 0.1 --cover 3 --cb_explore {}".format(
num_actions)
if seed:
cmd += " --random_seed {}".format(seed)
bandit = pyvw.vw(cmd, quiet=True)
return bandit
def get_vw(self):
"""Factory to create a vw instance on demand
Returns
-------
pyvw.vw instance
"""
if self.vw_ is None:
self.vw_ = vw(**self.params)
# set label type
self.label_type_ = self.vw_.get_label_type()
return self.vw_
def test_example_features():
vw_ex = vw(quiet=True)
ex = vw_ex.example("1 |a two features |b more features here")
ns = pyvw.namespace_id(ex, 1)
assert ex.get_feature_id(ns, "a") == 127530
ex.push_hashed_feature(ns, 1122)
ex.push_features("x", [("c", 1.0), "d"])
ex.push_feature(ns, 11000)
assert ex.num_features_in("x") == 2
assert ex.sum_feat_sq(ns) == 5.0
ns2 = pyvw.namespace_id(ex, 2)
ex.push_namespace(ns2)
assert ex.pop_namespace()
def get_vw(self):
"""Factory to create a vw instance on demand
Returns
-------
pyvw.vw instance
"""
if self.vw_ is None:
self.vw_ = vw(**self.params)
# set label type
self.label_type_ = self.vw_.get_label_type()
return self.vw_
def test_example_features():
vw_ex = vw(quiet=True)
ex = vw_ex.example('1 |a two features |b more features here')
ns = pyvw.namespace_id(ex, 1)
assert ex.get_feature_id(ns, 'a') == 127530
ex.push_hashed_feature(ns, 1122)
ex.push_features('x', [('c', 1.), 'd'])
ex.push_feature(ns, 11000)
assert ex.num_features_in('x') == 2
assert ex.sum_feat_sq(ns) == 5.0
ns2 = pyvw.namespace_id(ex, 2)
ex.push_namespace(ns2)
assert ex.pop_namespace()
def test_regressor_args():
# load and parse external data file
data_file = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'resources', 'train.dat')
model = vw(oaa=3, data=data_file, passes=30, c=True, k=True)
assert model.predict('| feature1:2.5') == 1
# update model in memory
for _ in range(10):
model.learn('3 | feature1:2.5')
assert model.predict('| feature1:2.5') == 3
# save model
model.save('tmp.model')
del model
# load initial regressor and confirm updated prediction
new_model = vw(i='tmp.model', quiet=True)
assert new_model.predict('| feature1:2.5') == 3
del new_model
# clean up
os.remove('{}.cache'.format(data_file))
os.remove('tmp.model')
def model_pred(trn_tmp_xy,val_tmp_x,val_tmp_y, tst_x):
param = ['-b 7 ' +
'--link logistic ' +
'--loss_function logistic ' +
'-l 0.2 ' +
'--l1 0 ' +
'--l2 0 ' +
'--holdout_off ' +
'--total 32 ' +
'-f vw.model ' +
'--readable_model vw.readable.model']
vw = pyvw.vw(*param)
best_iter = 400
for iteration in xrange(best_iter):
for i in xrange(len(trn_tmp_xy)):
vw.learn(trn_tmp_xy[i])
vw.finish()
vw = pyvw.vw("-i vw.model -t")
pred_trn_tmp = [vw.predict(sample) for sample in val_tmp_x]
pred_tst_tmp = [vw.predict(sample) for sample in tst_x]
return pred_trn_tmp, pred_tst_tmp, best_iter
def _create_model(self, project):
self.info('creating VW model (algorithm: {})'.format(self.algorithm))
trainpath = os.path.join(self.datadir, self.TRAIN_FILE)
params = self._create_params({
'data': trainpath,
self.algorithm: len(project.subjects)
})
if params.get('passes', 1) > 1:
# need a cache file when there are multiple passes
params.update({'cache': True, 'kill_cache': True})
self.debug("model parameters: {}".format(params))
self._model = pyvw.vw(**params)
modelpath = os.path.join(self.datadir, self.MODEL_FILE)
self._model.save(modelpath)
def initialize(self):
if self._model is None:
path = os.path.join(self.datadir, self.MODEL_FILE)
if not os.path.exists(path):
raise NotInitializedException(
'model {} not found'.format(path),
backend_id=self.backend_id)
self.debug('loading VW model from {}'.format(path))
params = self._create_params({'i': path, 'quiet': True})
if 'passes' in params:
# don't confuse the model with passes
del params['passes']
self.debug("model parameters: {}".format(params))
self._model = pyvw.vw(**params)
self.debug('loaded model {}'.format(str(self._model)))
def mini_vw(inputFile, numPasses, otherArgs):
vw = pyvw.vw(otherArgs)
for p in range(numPasses):
print 'pass', (p+1)
h = open(inputFile, 'r')
for l in h.readlines():
if learnFromStrings:
vw.learn(l)
else:
ex = vw.example(l)
vw.learn(ex)
ex.finish()
h.close()
vw.finish()
def test_namespace_id():
vw_ex = vw(quiet=True)
ex = vw_ex.example("1 |a two features |b more features here")
nm1 = pyvw.namespace_id(ex, 0)
nm2 = pyvw.namespace_id(ex, 1)
nm3 = pyvw.namespace_id(ex, 2)
assert nm1.id == 0
assert nm1.ord_ns == 97
assert nm1.ns == "a"
assert nm2.id == 1
assert nm2.ord_ns == 98
assert nm2.ns == "b"
assert nm3.id == 2
assert nm3.ord_ns == 128
assert nm3.ns == "\x80" # Represents string of ord_ns
def test_prob_prediction_type():
model = vw(loss_function='logistic',
csoaa_ldf='mc',
probabilities=True,
quiet=True)
multi_ex = [
model.example('1:0.2 | a b c'),
model.example('2:0.8 | a b c')
]
model.learn(multi_ex)
assert model.get_prediction_type() == model.pPROB
multi_ex = [model.example('1 | a b c'), model.example('2 | a b c')]
prediction = model.predict(multi_ex)
assert isinstance(prediction, float)
del model
def test_basic(self):
vw = pyvw.vw(quiet=True)
ex = vw.example('1 | a b c')
vw.learn(ex)
self.assertEqual(0.632030725479126, vw.predict(ex))
ds = config['DecisionService']
cache_folder = ds['CacheFolder']
for root, subdirs, files in os.walk(os.path.join(cache_folder, 'onlinetrainer')):
print('looking at folder {0}'.format(root))
model = None
trackback = None
for file in files:
if file == 'model':
model = os.path.join(root, file)
continue
if file == 'model.trackback':
trackback = os.path.join(root, file)
continue
if model is None or trackback is None:
continue
print('looking at folder {0}'.format(root))
with open(trackback, 'r') as f:
first_line = f.readline()
if (first_line.startswith('modelid:')):
continue
vw = pyvw.vw("--quiet -i {0}".format(model))
id = vw.get_id()
del vw
line_prepender(trackback, 'modelid: {0}\n'.format(id))
sortedSpans = []
for s in spans: sortedSpans.append(s)
sortedSpans.sort()
oracle = []
for id in range(len(sortedSpans)):
if sortedSpans[id][0] > sortedSpans[0][0]: break
oracle.append( sortedSpans[id][1] )
pred = self.sch.predict(examples = examples,
my_tag = i+1,
oracle = oracle,
condition = [ (i, 'p'), (i-1, 'q') ] )
self.vw.finish_example(examples)
output.append( spans[pred][2] )
for j in spans[pred][2]:
covered[j] = True
return output
print('training LDF')
vw = pyvw.vw("--search 0 --csoaa_ldf m --search_task hook --ring_size 1024 --quiet -q ef -q ep")
task = vw.init_search_task(WordAligner)
for p in range(10):
task.learn(my_dataset)
print('====== test ======')
print(task.predict( ("the blue flower".split(), ([],[],[]), "la fleur bleue".split()) ))
print('should have printed [[0], [2], [1]]')
from vowpalwabbit import pyvw
vw = pyvw.vw('--audit')
full = vw.example( { 'a': ['b'], 'x': ['y'] } )
full.learn()
part = vw.example( {'a': ['b'] } )
part.learn()
part.push_features('x', ['y'])
part.learn()
part.erase_namespace(ord('x'))
part.push_features('x', ['z'])
part.learn()
def test_cost_sensitive_label():
model = vw(csoaa=4, quiet=True)
assert pyvw.cost_sensitive_label(model.example('1 |')).costs[0].label == 1
del model
def test_cbandits_label():
model = vw(cb=4, quiet=True)
assert pyvw.cbandits_label(model.example('1 |')).costs[0].label == 1
del model
def test_del(self):
vw = pyvw.vw()
del vw
def test_finish(self):
vw = pyvw.vw()
assert not vw.finished
vw.finish()
assert vw.finished
def vw(self):
return pyvw.vw(quiet=True, b=BIT_SIZE)
from vowpalwabbit import pyvw
def my_predict(vw, ex):
pp = 0.
for f,v in ex.iter_features():
pp += vw.get_weight(f) * v
return pp
def ensure_close(a,b,eps=1e-6):
if abs(a-b) > eps:
raise Exception("test failed: expected " + str(a) + " and " + str(b) + " to be " + str(eps) + "-close, but they differ by " + str(abs(a-b)))
###############################################################################
vw = pyvw.vw("--quiet")
###############################################################################
vw.learn("1 |x a b")
###############################################################################
print('# do some stuff with a read example:')
ex = vw.example("1 |x a b |y c")
ex.learn() ; ex.learn() ; ex.learn() ; ex.learn()
updated_pred = ex.get_updated_prediction()
print('current partial prediction =', updated_pred)
# compute our own prediction
(NOUN, 'monster'),
(VERB, 'ate'),
(DET , 'a'),
(ADJ , 'big'),
(NOUN, 'sandwich')],
[(DET , 'the'),
(NOUN, 'sandwich'),
(VERB, 'was'),
(ADJ , 'tasty')],
[(NOUN, 'it'),
(VERB, 'ate'),
(NOUN, 'it'),
(ADJ , 'all')] ]
# initialize VW as usual, but use 'hook' as the search_task
vw = pyvw.vw("--search 4 --quiet --search_task hook --ring_size 1024")
# tell VW to construct your search task object
sequenceLabeler = vw.init_search_task(SequenceLabeler)
# train it on the above dataset ten times; the my_dataset.__iter__ feeds into _run above
print('training!', file=sys.stderr)
for i in range(10):
sequenceLabeler.learn(my_dataset)
# now see the predictions on a test sentence
print('predicting!', file=sys.stderr)
print(sequenceLabeler.predict( [(1,w) for w in "the sandwich ate a monster".split()] ))
print('should have printed: [1, 2, 3, 1, 2]')
vw_args = {
'quiet': True,
'passes': 10,
'cache': True,
'f': "%s-predictor.vw" % topic,
'k': True,
'ngram': 2,
'skips': 2,
'ftrl': True,
'decay_learning_rate': 0.99,
'r': "%s-predictions.txt" % topic,
# 'progressive_validation': "%s-validations.txt" % topic,
'loss_function': 'hinge'
}
vw = pyvw.vw(**vw_args)
for tweet in get_vw('%s-classified.train.vw' % topic):
if (len(tweet) < 3):
continue
if tweet[:1] == '0':
tweet = '-1' + tweet[1:]
ex = vw.example(tweet)
vw.learn(ex)
# print(vw.predict(ex))
# print(ex)
print("%s" % (re.sub(r'\n', '', tweet)))
# out.write(features + "\n")
# counter += 1
def test_delete():
model = vw(quiet=True, b=BIT_SIZE)
assert 'model' in locals()
del model
assert 'model' not in locals()