# coding: utf8 from __future__ import absolute_import, unicode_literals from contextlib import contextmanager import dill import numpy from thinc.neural import Model from thinc.neural.ops import NumpyOps, CupyOps from .tokenizer import Tokenizer from .vocab import Vocab from .tagger import Tagger from .lemmatizer import Lemmatizer from .train import Trainer from .syntax.parser import get_templates from .syntax.nonproj import PseudoProjectivity from .pipeline import NeuralDependencyParser, EntityRecognizer from .pipeline import TokenVectorEncoder, NeuralTagger, NeuralEntityRecognizer from .compat import json_dumps from .attrs import IS_STOP from .lang.punctuation import TOKENIZER_PREFIXES, TOKENIZER_SUFFIXES, TOKENIZER_INFIXES from .lang.tokenizer_exceptions import TOKEN_MATCH from .lang.tag_map import TAG_MAP from .lang.lex_attrs import LEX_ATTRS from . import util class BaseDefaults(object): @classmethod def create_lemmatizer(cls, nlp=None): return Lemmatizer(cls.lemma_index, cls.lemma_exc, cls.lemma_rules) @classmethod def create_vocab(cls, nlp=None): lemmatizer = cls.create_lemmatizer(nlp) lex_attr_getters = dict(cls.lex_attr_getters) # This is messy, but it's the minimal working fix to Issue #639. lex_attr_getters[IS_STOP] = lambda string: string.lower() in cls.stop_words vocab = Vocab(lex_attr_getters=lex_attr_getters, tag_map=cls.tag_map, lemmatizer=lemmatizer) for tag_str, exc in cls.morph_rules.items(): for orth_str, attrs in exc.items(): vocab.morphology.add_special_case(tag_str, orth_str, attrs) return vocab @classmethod def create_tokenizer(cls, nlp=None): rules = cls.tokenizer_exceptions token_match = cls.token_match prefix_search = util.compile_prefix_regex(cls.prefixes).search \ if cls.prefixes else None suffix_search = util.compile_suffix_regex(cls.suffixes).search \ if cls.suffixes else None infix_finditer = util.compile_infix_regex(cls.infixes).finditer \ if cls.infixes else None vocab = nlp.vocab if nlp is not None else cls.create_vocab(nlp) return Tokenizer(vocab, rules=rules, prefix_search=prefix_search, suffix_search=suffix_search, infix_finditer=infix_finditer, token_match=token_match) @classmethod def create_tagger(cls, nlp=None, **cfg): if nlp is None: return NeuralTagger(cls.create_vocab(nlp), **cfg) else: return NeuralTagger(nlp.vocab, **cfg) @classmethod def create_parser(cls, nlp=None, **cfg): if nlp is None: return NeuralDependencyParser(cls.create_vocab(nlp), **cfg) else: return NeuralDependencyParser(nlp.vocab, **cfg) @classmethod def create_entity(cls, nlp=None, **cfg): if nlp is None: return NeuralEntityRecognizer(cls.create_vocab(nlp), **cfg) else: return NeuralEntityRecognizer(nlp.vocab, **cfg) @classmethod def create_pipeline(cls, nlp=None): meta = nlp.meta if nlp is not None else {} # Resolve strings, like "cnn", "lstm", etc pipeline = [] for entry in cls.pipeline: factory = cls.Defaults.factories[entry] pipeline.append(factory(nlp, **meta.get(entry, {}))) return pipeline factories = { 'make_doc': create_tokenizer, 'token_vectors': lambda nlp, **cfg: TokenVectorEncoder(nlp.vocab, **cfg), 'tags': lambda nlp, **cfg: NeuralTagger(nlp.vocab, **cfg), 'dependencies': lambda nlp, **cfg: NeuralDependencyParser(nlp.vocab, **cfg), 'entities': lambda nlp, **cfg: NeuralEntityRecognizer(nlp.vocab, **cfg), } token_match = TOKEN_MATCH prefixes = tuple(TOKENIZER_PREFIXES) suffixes = tuple(TOKENIZER_SUFFIXES) infixes = tuple(TOKENIZER_INFIXES) tag_map = dict(TAG_MAP) tokenizer_exceptions = {} parser_features = get_templates('parser') entity_features = get_templates('ner') tagger_features = Tagger.feature_templates # TODO -- fix this stop_words = set() lemma_rules = {} lemma_exc = {} lemma_index = {} morph_rules = {} lex_attr_getters = LEX_ATTRS class Language(object): """A text-processing pipeline. Usually you'll load this once per process, and pass the instance around your application. """ Defaults = BaseDefaults lang = None def __init__(self, vocab=True, make_doc=True, pipeline=None, meta={}): """Initialise a Language object. vocab (Vocab): A `Vocab` object. If `True`, a vocab is created via `Language.Defaults.create_vocab`. make_doc (function): A function that takes text and returns a `Doc` object. Usually a `Tokenizer`. pipeline (list): A list of annotation processes or IDs of annotation, processes, e.g. a `Tagger` object, or `'tagger'`. IDs are looked up in `Language.Defaults.factories`. meta (dict): Custom meta data for the Language class. Is written to by models to add model meta data. RETURNS (Language): The newly constructed object. """ self.meta = dict(meta) if vocab is True: factory = self.Defaults.create_vocab vocab = factory(self, **meta.get('vocab', {})) self.vocab = vocab if make_doc is True: factory = self.Defaults.create_tokenizer make_doc = factory(self, **meta.get('tokenizer', {})) self.make_doc = make_doc if pipeline is True: self.pipeline = self.Defaults.create_pipeline(self) elif pipeline: self.pipeline = list(pipeline) # Resolve strings, like "cnn", "lstm", etc for i, entry in enumerate(self.pipeline): if entry in self.Defaults.factories: factory = self.Defaults.factories[entry] self.pipeline[i] = factory(self, **meta.get(entry, {})) else: self.pipeline = [] def __call__(self, text, state=None, **disabled): """Apply the pipeline to some text. The text can span multiple sentences, and can contain arbtrary whitespace. Alignment into the original string is preserved. text (unicode): The text to be processed. **disabled: Elements of the pipeline that should not be run. RETURNS (Doc): A container for accessing the annotations. EXAMPLE: >>> tokens = nlp('An example sentence. Another example sentence.') >>> tokens[0].text, tokens[0].head.tag_ ('An', 'NN') """ doc = self.make_doc(text) for proc in self.pipeline: name = getattr(proc, 'name', None) if name in disabled and not disabled[name]: continue state = proc(doc, state=state) return doc def update(self, docs, golds, state=None, drop=0., sgd=None): """Update the models in the pipeline. docs (iterable): A batch of `Doc` objects. golds (iterable): A batch of `GoldParse` objects. drop (float): The droput rate. sgd (function): An optimizer. RETURNS (dict): Results from the update. EXAMPLE: >>> with nlp.begin_training(gold, use_gpu=True) as (trainer, optimizer): >>> for epoch in trainer.epochs(gold): >>> for docs, golds in epoch: >>> state = nlp.update(docs, golds, sgd=optimizer) """ grads = {} def get_grads(W, dW, key=None): grads[key] = (W, dW) state = {} if state is None else state for process in self.pipeline: if hasattr(process, 'update'): state = process.update(docs, golds, state=state, drop=drop, sgd=get_grads) else: process(docs, state=state) if sgd is not None: for key, (W, dW) in grads.items(): # TODO: Unhack this when thinc improves if isinstance(W, numpy.ndarray): sgd.ops = NumpyOps() else: sgd.ops = CupyOps() sgd(W, dW, key=key) return state @contextmanager def begin_training(self, gold_tuples, **cfg): """Allocate models, pre-process training data and acquire a trainer and optimizer. Used as a contextmanager. gold_tuples (iterable): Gold-standard training data. **cfg: Config parameters. YIELDS (tuple): A trainer and an optimizer. EXAMPLE: >>> with nlp.begin_training(gold, use_gpu=True) as (trainer, optimizer): >>> for epoch in trainer.epochs(gold): >>> for docs, golds in epoch: >>> state = nlp.update(docs, golds, sgd=optimizer) """ # Populate vocab for _, annots_brackets in gold_tuples: for annots, _ in annots_brackets: for word in annots[1]: _ = self.vocab[word] # Handle crossing dependencies gold_tuples = PseudoProjectivity.preprocess_training_data(gold_tuples) contexts = [] if cfg.get('use_gpu'): Model.ops = CupyOps() Model.Ops = CupyOps print("Use GPU") for proc in self.pipeline: if hasattr(proc, 'begin_training'): context = proc.begin_training(gold_tuples, pipeline=self.pipeline) contexts.append(context) trainer = Trainer(self, gold_tuples, **cfg) yield trainer, trainer.optimizer @contextmanager def use_params(self, params, **cfg): """Replace weights of models in the pipeline with those provided in the params dictionary. Can be used as a contextmanager, in which case, models go back to their original weights after the block. params (dict): A dictionary of parameters keyed by model ID. **cfg: Config parameters. EXAMPLE: >>> with nlp.use_params(optimizer.averages): >>> nlp.to_disk('/tmp/checkpoint') """ contexts = [pipe.use_params(params) for pipe in self.pipeline if hasattr(pipe, 'use_params')] # TODO: Having trouble with contextlib # Workaround: these aren't actually context managers atm. for context in contexts: try: next(context) except StopIteration: pass yield for context in contexts: try: next(context) except StopIteration: pass def pipe(self, texts, n_threads=2, batch_size=1000, **disabled): """Process texts as a stream, and yield `Doc` objects in order. Supports GIL-free multi-threading. texts (iterator): A sequence of texts to process. n_threads (int): The number of worker threads to use. If -1, OpenMP will decide how many to use at run time. Default is 2. batch_size (int): The number of texts to buffer. **disabled: Pipeline components to exclude. YIELDS (Doc): Documents in the order of the original text. EXAMPLE: >>> texts = [u'One document.', u'...', u'Lots of documents'] >>> for doc in nlp.pipe(texts, batch_size=50, n_threads=4): >>> assert doc.is_parsed """ #stream = ((self.make_doc(text), None) for text in texts) stream = ((doc, {}) for doc in texts) for proc in self.pipeline: name = getattr(proc, 'name', None) if name in disabled and not disabled[name]: continue if hasattr(proc, 'pipe'): stream = proc.pipe(stream, n_threads=n_threads, batch_size=batch_size) else: stream = (proc(doc, state) for doc, state in stream) for doc, state in stream: yield doc def to_disk(self, path, **exclude): """Save the current state to a directory. path (unicode or Path): A path to a directory, which will be created if it doesn't exist. Paths may be either strings or `Path`-like objects. **exclude: Named attributes to prevent from being saved. EXAMPLE: >>> nlp.to_disk('/path/to/models') """ path = util.ensure_path(path) if not path.exists(): path.mkdir() if not path.is_dir(): raise IOError("Output path must be a directory") props = {} for name, value in self.__dict__.items(): if name in exclude: continue if hasattr(value, 'to_disk'): value.to_disk(path / name) else: props[name] = value with (path / 'props.pickle').open('wb') as file_: dill.dump(props, file_) def from_disk(self, path, **exclude): """Loads state from a directory. Modifies the object in place and returns it. path (unicode or Path): A path to a directory. Paths may be either strings or `Path`-like objects. **exclude: Named attributes to prevent from being loaded. RETURNS (Language): The modified `Language` object. EXAMPLE: >>> from spacy.language import Language >>> nlp = Language().from_disk('/path/to/models') """ path = util.ensure_path(path) for name in path.iterdir(): if name not in exclude and hasattr(self, str(name)): getattr(self, name).from_disk(path / name) with (path / 'props.pickle').open('rb') as file_: bytes_data = file_.read() self.from_bytes(bytes_data, **exclude) return self def to_bytes(self, **exclude): """Serialize the current state to a binary string. **exclude: Named attributes to prevent from being serialized. RETURNS (bytes): The serialized form of the `Language` object. """ props = dict(self.__dict__) for key in exclude: if key in props: props.pop(key) return dill.dumps(props, -1) def from_bytes(self, bytes_data, **exclude): """Load state from a binary string. bytes_data (bytes): The data to load from. **exclude: Named attributes to prevent from being loaded. RETURNS (Language): The `Language` object. """ props = dill.loads(bytes_data) for key, value in props.items(): if key not in exclude: setattr(self, key, value) return self