mirror of
https://github.com/explosion/spaCy.git
synced 2024-12-25 17:36:30 +03:00
685 lines
21 KiB
Python
685 lines
21 KiB
Python
# coding: utf8
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from __future__ import unicode_literals, print_function
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import os
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import pkg_resources
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import importlib
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import re
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from pathlib import Path
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import random
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from collections import OrderedDict
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from thinc.neural._classes.model import Model
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from thinc.neural.ops import NumpyOps
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import functools
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import itertools
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import numpy.random
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import srsly
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from jsonschema import Draft4Validator
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try:
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import cupy.random
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except ImportError:
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cupy = None
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from .symbols import ORTH
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from .compat import cupy, CudaStream, path2str, basestring_, unicode_
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from .compat import import_file
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from .errors import Errors
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LANGUAGES = {}
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_data_path = Path(__file__).parent / "data"
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_PRINT_ENV = False
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def set_env_log(value):
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global _PRINT_ENV
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_PRINT_ENV = value
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def get_lang_class(lang):
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"""Import and load a Language class.
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lang (unicode): Two-letter language code, e.g. 'en'.
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RETURNS (Language): Language class.
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"""
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global LANGUAGES
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# Check if an entry point is exposed for the language code
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entry_point = get_entry_point("spacy_languages", lang)
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if entry_point is not None:
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LANGUAGES[lang] = entry_point
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return entry_point
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if lang not in LANGUAGES:
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try:
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module = importlib.import_module(".lang.%s" % lang, "spacy")
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except ImportError:
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raise ImportError(Errors.E048.format(lang=lang))
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LANGUAGES[lang] = getattr(module, module.__all__[0])
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return LANGUAGES[lang]
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def set_lang_class(name, cls):
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"""Set a custom Language class name that can be loaded via get_lang_class.
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name (unicode): Name of Language class.
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cls (Language): Language class.
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"""
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global LANGUAGES
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LANGUAGES[name] = cls
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def get_data_path(require_exists=True):
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"""Get path to spaCy data directory.
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require_exists (bool): Only return path if it exists, otherwise None.
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RETURNS (Path or None): Data path or None.
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"""
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if not require_exists:
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return _data_path
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else:
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return _data_path if _data_path.exists() else None
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def set_data_path(path):
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"""Set path to spaCy data directory.
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path (unicode or Path): Path to new data directory.
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"""
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global _data_path
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_data_path = ensure_path(path)
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def ensure_path(path):
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"""Ensure string is converted to a Path.
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path: Anything. If string, it's converted to Path.
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RETURNS: Path or original argument.
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"""
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if isinstance(path, basestring_):
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return Path(path)
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else:
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return path
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def load_model(name, **overrides):
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"""Load a model from a shortcut link, package or data path.
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name (unicode): Package name, shortcut link or model path.
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**overrides: Specific overrides, like pipeline components to disable.
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RETURNS (Language): `Language` class with the loaded model.
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"""
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data_path = get_data_path()
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if not data_path or not data_path.exists():
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raise IOError(Errors.E049.format(path=path2str(data_path)))
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if isinstance(name, basestring_): # in data dir / shortcut
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if name in set([d.name for d in data_path.iterdir()]):
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return load_model_from_link(name, **overrides)
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if is_package(name): # installed as package
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return load_model_from_package(name, **overrides)
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if Path(name).exists(): # path to model data directory
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return load_model_from_path(Path(name), **overrides)
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elif hasattr(name, "exists"): # Path or Path-like to model data
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return load_model_from_path(name, **overrides)
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raise IOError(Errors.E050.format(name=name))
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def load_model_from_link(name, **overrides):
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"""Load a model from a shortcut link, or directory in spaCy data path."""
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path = get_data_path() / name / "__init__.py"
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try:
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cls = import_file(name, path)
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except AttributeError:
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raise IOError(Errors.E051.format(name=name))
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return cls.load(**overrides)
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def load_model_from_package(name, **overrides):
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"""Load a model from an installed package."""
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cls = importlib.import_module(name)
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return cls.load(**overrides)
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def load_model_from_path(model_path, meta=False, **overrides):
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"""Load a model from a data directory path. Creates Language class with
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pipeline from meta.json and then calls from_disk() with path."""
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if not meta:
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meta = get_model_meta(model_path)
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cls = get_lang_class(meta["lang"])
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nlp = cls(meta=meta, **overrides)
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pipeline = meta.get("pipeline", [])
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disable = overrides.get("disable", [])
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if pipeline is True:
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pipeline = nlp.Defaults.pipe_names
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elif pipeline in (False, None):
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pipeline = []
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for name in pipeline:
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if name not in disable:
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config = meta.get("pipeline_args", {}).get(name, {})
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component = nlp.create_pipe(name, config=config)
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nlp.add_pipe(component, name=name)
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return nlp.from_disk(model_path)
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def load_model_from_init_py(init_file, **overrides):
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"""Helper function to use in the `load()` method of a model package's
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__init__.py.
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init_file (unicode): Path to model's __init__.py, i.e. `__file__`.
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**overrides: Specific overrides, like pipeline components to disable.
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RETURNS (Language): `Language` class with loaded model.
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"""
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model_path = Path(init_file).parent
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meta = get_model_meta(model_path)
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data_dir = "%s_%s-%s" % (meta["lang"], meta["name"], meta["version"])
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data_path = model_path / data_dir
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if not model_path.exists():
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raise IOError(Errors.E052.format(path=path2str(data_path)))
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return load_model_from_path(data_path, meta, **overrides)
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def get_model_meta(path):
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"""Get model meta.json from a directory path and validate its contents.
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path (unicode or Path): Path to model directory.
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RETURNS (dict): The model's meta data.
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"""
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model_path = ensure_path(path)
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if not model_path.exists():
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raise IOError(Errors.E052.format(path=path2str(model_path)))
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meta_path = model_path / "meta.json"
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if not meta_path.is_file():
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raise IOError(Errors.E053.format(path=meta_path))
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meta = srsly.read_json(meta_path)
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for setting in ["lang", "name", "version"]:
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if setting not in meta or not meta[setting]:
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raise ValueError(Errors.E054.format(setting=setting))
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return meta
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def is_package(name):
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"""Check if string maps to a package installed via pip.
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name (unicode): Name of package.
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RETURNS (bool): True if installed package, False if not.
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"""
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name = name.lower() # compare package name against lowercase name
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packages = pkg_resources.working_set.by_key.keys()
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for package in packages:
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if package.lower().replace("-", "_") == name:
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return True
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return False
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def get_package_path(name):
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"""Get the path to an installed package.
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name (unicode): Package name.
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RETURNS (Path): Path to installed package.
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"""
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name = name.lower() # use lowercase version to be safe
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# Here we're importing the module just to find it. This is worryingly
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# indirect, but it's otherwise very difficult to find the package.
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pkg = importlib.import_module(name)
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return Path(pkg.__file__).parent
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def get_entry_points(key):
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"""Get registered entry points from other packages for a given key, e.g.
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'spacy_factories' and return them as a dictionary, keyed by name.
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key (unicode): Entry point name.
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RETURNS (dict): Entry points, keyed by name.
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"""
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result = {}
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for entry_point in pkg_resources.iter_entry_points(key):
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result[entry_point.name] = entry_point.load()
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return result
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def get_entry_point(key, value):
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"""Check if registered entry point is available for a given name and
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load it. Otherwise, return None.
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key (unicode): Entry point name.
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value (unicode): Name of entry point to load.
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RETURNS: The loaded entry point or None.
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"""
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for entry_point in pkg_resources.iter_entry_points(key):
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if entry_point.name == value:
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return entry_point.load()
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def is_in_jupyter():
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"""Check if user is running spaCy from a Jupyter notebook by detecting the
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IPython kernel. Mainly used for the displaCy visualizer.
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RETURNS (bool): True if in Jupyter, False if not.
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"""
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# https://stackoverflow.com/a/39662359/6400719
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try:
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shell = get_ipython().__class__.__name__
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if shell == "ZMQInteractiveShell":
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return True # Jupyter notebook or qtconsole
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except NameError:
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return False # Probably standard Python interpreter
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return False
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def get_cuda_stream(require=False):
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if CudaStream is None:
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return None
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elif isinstance(Model.ops, NumpyOps):
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return None
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else:
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return CudaStream()
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def get_async(stream, numpy_array):
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if cupy is None:
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return numpy_array
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else:
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array = cupy.ndarray(numpy_array.shape, order="C", dtype=numpy_array.dtype)
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array.set(numpy_array, stream=stream)
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return array
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def env_opt(name, default=None):
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if type(default) is float:
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type_convert = float
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else:
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type_convert = int
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if "SPACY_" + name.upper() in os.environ:
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value = type_convert(os.environ["SPACY_" + name.upper()])
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if _PRINT_ENV:
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print(name, "=", repr(value), "via", "$SPACY_" + name.upper())
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return value
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elif name in os.environ:
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value = type_convert(os.environ[name])
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if _PRINT_ENV:
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print(name, "=", repr(value), "via", "$" + name)
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return value
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else:
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if _PRINT_ENV:
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print(name, "=", repr(default), "by default")
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return default
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def read_regex(path):
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path = ensure_path(path)
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with path.open() as file_:
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entries = file_.read().split("\n")
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expression = "|".join(
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["^" + re.escape(piece) for piece in entries if piece.strip()]
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)
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return re.compile(expression)
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def compile_prefix_regex(entries):
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if "(" in entries:
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# Handle deprecated data
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expression = "|".join(
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["^" + re.escape(piece) for piece in entries if piece.strip()]
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)
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return re.compile(expression)
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else:
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expression = "|".join(["^" + piece for piece in entries if piece.strip()])
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return re.compile(expression)
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def compile_suffix_regex(entries):
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expression = "|".join([piece + "$" for piece in entries if piece.strip()])
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return re.compile(expression)
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def compile_infix_regex(entries):
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expression = "|".join([piece for piece in entries if piece.strip()])
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return re.compile(expression)
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def add_lookups(default_func, *lookups):
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"""Extend an attribute function with special cases. If a word is in the
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lookups, the value is returned. Otherwise the previous function is used.
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default_func (callable): The default function to execute.
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*lookups (dict): Lookup dictionary mapping string to attribute value.
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RETURNS (callable): Lexical attribute getter.
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"""
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# This is implemented as functools.partial instead of a closure, to allow
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# pickle to work.
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return functools.partial(_get_attr_unless_lookup, default_func, lookups)
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def _get_attr_unless_lookup(default_func, lookups, string):
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for lookup in lookups:
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if string in lookup:
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return lookup[string]
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return default_func(string)
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def update_exc(base_exceptions, *addition_dicts):
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"""Update and validate tokenizer exceptions. Will overwrite exceptions.
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base_exceptions (dict): Base exceptions.
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*addition_dicts (dict): Exceptions to add to the base dict, in order.
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RETURNS (dict): Combined tokenizer exceptions.
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"""
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exc = dict(base_exceptions)
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for additions in addition_dicts:
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for orth, token_attrs in additions.items():
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if not all(isinstance(attr[ORTH], unicode_) for attr in token_attrs):
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raise ValueError(Errors.E055.format(key=orth, orths=token_attrs))
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described_orth = "".join(attr[ORTH] for attr in token_attrs)
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if orth != described_orth:
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raise ValueError(Errors.E056.format(key=orth, orths=described_orth))
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exc.update(additions)
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exc = expand_exc(exc, "'", "’")
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return exc
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def expand_exc(excs, search, replace):
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"""Find string in tokenizer exceptions, duplicate entry and replace string.
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For example, to add additional versions with typographic apostrophes.
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excs (dict): Tokenizer exceptions.
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search (unicode): String to find and replace.
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replace (unicode): Replacement.
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RETURNS (dict): Combined tokenizer exceptions.
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"""
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def _fix_token(token, search, replace):
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fixed = dict(token)
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fixed[ORTH] = fixed[ORTH].replace(search, replace)
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return fixed
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new_excs = dict(excs)
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for token_string, tokens in excs.items():
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if search in token_string:
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new_key = token_string.replace(search, replace)
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new_value = [_fix_token(t, search, replace) for t in tokens]
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new_excs[new_key] = new_value
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return new_excs
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def normalize_slice(length, start, stop, step=None):
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if not (step is None or step == 1):
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raise ValueError(Errors.E057)
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if start is None:
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start = 0
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elif start < 0:
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start += length
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start = min(length, max(0, start))
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if stop is None:
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stop = length
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elif stop < 0:
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stop += length
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stop = min(length, max(start, stop))
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return start, stop
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def minibatch(items, size=8):
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"""Iterate over batches of items. `size` may be an iterator,
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so that batch-size can vary on each step.
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"""
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if isinstance(size, int):
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size_ = itertools.repeat(size)
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else:
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size_ = size
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items = iter(items)
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while True:
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batch_size = next(size_)
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batch = list(itertools.islice(items, int(batch_size)))
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if len(batch) == 0:
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break
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yield list(batch)
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def compounding(start, stop, compound):
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"""Yield an infinite series of compounding values. Each time the
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generator is called, a value is produced by multiplying the previous
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value by the compound rate.
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EXAMPLE:
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>>> sizes = compounding(1., 10., 1.5)
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>>> assert next(sizes) == 1.
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>>> assert next(sizes) == 1 * 1.5
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>>> assert next(sizes) == 1.5 * 1.5
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"""
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def clip(value):
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return max(value, stop) if (start > stop) else min(value, stop)
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curr = float(start)
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while True:
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yield clip(curr)
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curr *= compound
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def stepping(start, stop, steps):
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"""Yield an infinite series of values that step from a start value to a
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final value over some number of steps. Each step is (stop-start)/steps.
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After the final value is reached, the generator continues yielding that
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value.
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EXAMPLE:
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>>> sizes = stepping(1., 200., 100)
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>>> assert next(sizes) == 1.
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>>> assert next(sizes) == 1 * (200.-1.) / 100
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>>> assert next(sizes) == 1 + (200.-1.) / 100 + (200.-1.) / 100
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"""
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def clip(value):
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return max(value, stop) if (start > stop) else min(value, stop)
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curr = float(start)
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while True:
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yield clip(curr)
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curr += (stop - start) / steps
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def decaying(start, stop, decay):
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"""Yield an infinite series of linearly decaying values."""
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def clip(value):
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return max(value, stop) if (start > stop) else min(value, stop)
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nr_upd = 1.0
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while True:
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yield clip(start * 1.0 / (1.0 + decay * nr_upd))
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nr_upd += 1
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def minibatch_by_words(items, size, tuples=True, count_words=len):
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"""Create minibatches of a given number of words."""
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if isinstance(size, int):
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size_ = itertools.repeat(size)
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else:
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size_ = size
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items = iter(items)
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while True:
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batch_size = next(size_)
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batch = []
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while batch_size >= 0:
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try:
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if tuples:
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doc, gold = next(items)
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else:
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doc = next(items)
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except StopIteration:
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if batch:
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yield batch
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return
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batch_size -= count_words(doc)
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if tuples:
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batch.append((doc, gold))
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else:
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batch.append(doc)
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if batch:
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yield batch
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def itershuffle(iterable, bufsize=1000):
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"""Shuffle an iterator. This works by holding `bufsize` items back
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and yielding them sometime later. Obviously, this is not unbiased –
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but should be good enough for batching. Larger bufsize means less bias.
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From https://gist.github.com/andres-erbsen/1307752
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iterable (iterable): Iterator to shuffle.
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bufsize (int): Items to hold back.
|
||
YIELDS (iterable): The shuffled iterator.
|
||
"""
|
||
iterable = iter(iterable)
|
||
buf = []
|
||
try:
|
||
while True:
|
||
for i in range(random.randint(1, bufsize - len(buf))):
|
||
buf.append(next(iterable))
|
||
random.shuffle(buf)
|
||
for i in range(random.randint(1, bufsize)):
|
||
if buf:
|
||
yield buf.pop()
|
||
else:
|
||
break
|
||
except StopIteration:
|
||
random.shuffle(buf)
|
||
while buf:
|
||
yield buf.pop()
|
||
raise StopIteration
|
||
|
||
|
||
def to_bytes(getters, exclude):
|
||
serialized = OrderedDict()
|
||
for key, getter in getters.items():
|
||
if key not in exclude:
|
||
serialized[key] = getter()
|
||
return srsly.msgpack_dumps(serialized)
|
||
|
||
|
||
def from_bytes(bytes_data, setters, exclude):
|
||
msg = srsly.msgpack_loads(bytes_data)
|
||
for key, setter in setters.items():
|
||
if key not in exclude and key in msg:
|
||
setter(msg[key])
|
||
return msg
|
||
|
||
|
||
def to_disk(path, writers, exclude):
|
||
path = ensure_path(path)
|
||
if not path.exists():
|
||
path.mkdir()
|
||
for key, writer in writers.items():
|
||
if key not in exclude:
|
||
writer(path / key)
|
||
return path
|
||
|
||
|
||
def from_disk(path, readers, exclude):
|
||
path = ensure_path(path)
|
||
for key, reader in readers.items():
|
||
if key not in exclude:
|
||
reader(path / key)
|
||
return path
|
||
|
||
|
||
def minify_html(html):
|
||
"""Perform a template-specific, rudimentary HTML minification for displaCy.
|
||
Disclaimer: NOT a general-purpose solution, only removes indentation and
|
||
newlines.
|
||
|
||
html (unicode): Markup to minify.
|
||
RETURNS (unicode): "Minified" HTML.
|
||
"""
|
||
return html.strip().replace(" ", "").replace("\n", "")
|
||
|
||
|
||
def escape_html(text):
|
||
"""Replace <, >, &, " with their HTML encoded representation. Intended to
|
||
prevent HTML errors in rendered displaCy markup.
|
||
|
||
text (unicode): The original text.
|
||
RETURNS (unicode): Equivalent text to be safely used within HTML.
|
||
"""
|
||
text = text.replace("&", "&")
|
||
text = text.replace("<", "<")
|
||
text = text.replace(">", ">")
|
||
text = text.replace('"', """)
|
||
return text
|
||
|
||
|
||
def use_gpu(gpu_id):
|
||
try:
|
||
import cupy.cuda.device
|
||
except ImportError:
|
||
return None
|
||
from thinc.neural.ops import CupyOps
|
||
|
||
device = cupy.cuda.device.Device(gpu_id)
|
||
device.use()
|
||
Model.ops = CupyOps()
|
||
Model.Ops = CupyOps
|
||
return device
|
||
|
||
|
||
def fix_random_seed(seed=0):
|
||
random.seed(seed)
|
||
numpy.random.seed(seed)
|
||
if cupy is not None:
|
||
cupy.random.seed(seed)
|
||
|
||
|
||
def validate_schema(schema):
|
||
# TODO: replace with (stable) Draft6Validator, if available
|
||
validator = Draft4Validator(schema)
|
||
validator.check_schema(schema)
|
||
|
||
|
||
def validate_json(data, schema):
|
||
"""Validate data against a given JSON schema (see https://json-schema.org).
|
||
|
||
data: JSON-serializable data to validate.
|
||
schema (dict): The JSON schema.
|
||
RETURNS (list): A list of error messages, if available.
|
||
"""
|
||
# TODO: replace with (stable) Draft6Validator, if available
|
||
validator = Draft4Validator(schema)
|
||
errors = []
|
||
for err in sorted(validator.iter_errors(data), key=lambda e: e.path):
|
||
if err.path:
|
||
err_path = "[{}]".format(" -> ".join([str(p) for p in err.path]))
|
||
else:
|
||
err_path = ""
|
||
errors.append(err.message + " " + err_path)
|
||
return errors
|
||
|
||
|
||
class SimpleFrozenDict(dict):
|
||
"""Simplified implementation of a frozen dict, mainly used as default
|
||
function or method argument (for arguments that should default to empty
|
||
dictionary). Will raise an error if user or spaCy attempts to add to dict.
|
||
"""
|
||
|
||
def __setitem__(self, key, value):
|
||
raise NotImplementedError(Errors.E095)
|
||
|
||
def pop(self, key, default=None):
|
||
raise NotImplementedError(Errors.E095)
|
||
|
||
def update(self, other):
|
||
raise NotImplementedError(Errors.E095)
|
||
|
||
|
||
class DummyTokenizer(object):
|
||
# add dummy methods for to_bytes, from_bytes, to_disk and from_disk to
|
||
# allow serialization (see #1557)
|
||
def to_bytes(self, **exclude):
|
||
return b''
|
||
|
||
def from_bytes(self, _bytes_data, **exclude):
|
||
return self
|
||
|
||
def to_disk(self, _path, **exclude):
|
||
return None
|
||
|
||
def from_disk(self, _path, **exclude):
|
||
return self
|