mirror of https://github.com/explosion/spaCy.git
153 lines
4.0 KiB
Python
153 lines
4.0 KiB
Python
# coding: utf8
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"""
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Helpers for Python and platform compatibility. To distinguish them from
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the builtin functions, replacement functions are suffixed with an underscore,
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e.g. `unicode_`.
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DOCS: https://spacy.io/api/top-level#compat
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"""
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from __future__ import unicode_literals
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import os
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import sys
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import itertools
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from thinc.neural.util import copy_array
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try:
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import cPickle as pickle
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except ImportError:
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import pickle
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try:
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import copy_reg
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except ImportError:
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import copyreg as copy_reg
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try:
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from cupy.cuda.stream import Stream as CudaStream
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except ImportError:
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CudaStream = None
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try:
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import cupy
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except ImportError:
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cupy = None
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try:
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from thinc.neural.optimizers import Optimizer # noqa: F401
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except ImportError:
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from thinc.neural.optimizers import Adam as Optimizer # noqa: F401
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pickle = pickle
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copy_reg = copy_reg
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CudaStream = CudaStream
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cupy = cupy
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copy_array = copy_array
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izip = getattr(itertools, "izip", zip)
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is_windows = sys.platform.startswith("win")
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is_linux = sys.platform.startswith("linux")
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is_osx = sys.platform == "darwin"
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# See: https://github.com/benjaminp/six/blob/master/six.py
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is_python2 = sys.version_info[0] == 2
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is_python3 = sys.version_info[0] == 3
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is_python_pre_3_5 = is_python2 or (is_python3 and sys.version_info[1] < 5)
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if is_python2:
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bytes_ = str
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unicode_ = unicode # noqa: F821
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basestring_ = basestring # noqa: F821
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input_ = raw_input # noqa: F821
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path2str = lambda path: str(path).decode("utf8")
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elif is_python3:
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bytes_ = bytes
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unicode_ = str
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basestring_ = str
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input_ = input
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path2str = lambda path: str(path)
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def b_to_str(b_str):
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"""Convert a bytes object to a string.
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b_str (bytes): The object to convert.
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RETURNS (unicode): The converted string.
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"""
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if is_python2:
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return b_str
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# Important: if no encoding is set, string becomes "b'...'"
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return str(b_str, encoding="utf8")
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def symlink_to(orig, dest):
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"""Create a symlink. Used for model shortcut links.
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orig (unicode / Path): The origin path.
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dest (unicode / Path): The destination path of the symlink.
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"""
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if is_windows:
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import subprocess
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subprocess.call(["mklink", "/d", path2str(orig), path2str(dest)], shell=True)
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else:
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orig.symlink_to(dest)
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def symlink_remove(link):
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"""Remove a symlink. Used for model shortcut links.
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link (unicode / Path): The path to the symlink.
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"""
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# https://stackoverflow.com/q/26554135/6400719
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if os.path.isdir(path2str(link)) and is_windows:
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# this should only be on Py2.7 and windows
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os.rmdir(path2str(link))
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else:
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os.unlink(path2str(link))
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def is_config(python2=None, python3=None, windows=None, linux=None, osx=None):
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"""Check if a specific configuration of Python version and operating system
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matches the user's setup. Mostly used to display targeted error messages.
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python2 (bool): spaCy is executed with Python 2.x.
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python3 (bool): spaCy is executed with Python 3.x.
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windows (bool): spaCy is executed on Windows.
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linux (bool): spaCy is executed on Linux.
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osx (bool): spaCy is executed on OS X or macOS.
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RETURNS (bool): Whether the configuration matches the user's platform.
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DOCS: https://spacy.io/api/top-level#compat.is_config
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"""
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return (
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python2 in (None, is_python2)
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and python3 in (None, is_python3)
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and windows in (None, is_windows)
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and linux in (None, is_linux)
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and osx in (None, is_osx)
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)
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def import_file(name, loc):
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"""Import module from a file. Used to load models from a directory.
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name (unicode): Name of module to load.
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loc (unicode / Path): Path to the file.
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RETURNS: The loaded module.
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"""
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loc = path2str(loc)
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if is_python_pre_3_5:
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import imp
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return imp.load_source(name, loc)
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else:
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import importlib.util
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spec = importlib.util.spec_from_file_location(name, str(loc))
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module = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(module)
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return module
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