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# -*- coding: utf-8 -*-
"""
internal gevent python 2/python 3 bridges. Not for external use.
"""
from __future__ import print_function, absolute_import, division
import sys
import os
PY2 = sys.version_info[0] == 2
PY3 = sys.version_info[0] >= 3
PYPY = hasattr(sys, 'pypy_version_info')
WIN = sys.platform.startswith("win")
LINUX = sys.platform.startswith('linux')
OSX = sys.platform == 'darwin'
PURE_PYTHON = PYPY or os.getenv('PURE_PYTHON')
## Types
if PY3:
string_types = (str,)
integer_types = (int,)
text_type = str
native_path_types = (str, bytes)
thread_mod_name = '_thread'
else:
import __builtin__ # pylint:disable=import-error
string_types = (__builtin__.basestring,)
text_type = __builtin__.unicode
integer_types = (int, __builtin__.long)
native_path_types = string_types
thread_mod_name = 'thread'
def NativeStrIO():
import io
return io.BytesIO() if str is bytes else io.StringIO()
## Exceptions
if PY3:
def reraise(t, value, tb=None): # pylint:disable=unused-argument
if value.__traceback__ is not tb and tb is not None:
raise value.with_traceback(tb)
raise value
def exc_clear():
pass
else:
from gevent._util_py2 import reraise # pylint:disable=import-error,no-name-in-module
reraise = reraise # export
exc_clear = sys.exc_clear
## import locks
try:
# In Python 3.4 and newer in CPython and PyPy3,
# imp.acquire_lock and imp.release_lock are delegated to
# '_imp'. (Which is also used by importlib.) 'imp' itself is
# deprecated. Avoid that warning.
import _imp as imp
except ImportError:
import imp
imp_acquire_lock = imp.acquire_lock
imp_release_lock = imp.release_lock
## Functions
if PY3:
iteritems = dict.items
itervalues = dict.values
xrange = range
izip = zip
else:
iteritems = dict.iteritems # python 3: pylint:disable=no-member
itervalues = dict.itervalues # python 3: pylint:disable=no-member
xrange = __builtin__.xrange
from itertools import izip # python 3: pylint:disable=no-member,no-name-in-module
izip = izip
# fspath from 3.6 os.py, but modified to raise the same exceptions as the
# real native implementation.
# Define for testing
def _fspath(path):
"""
Return the path representation of a path-like object.
If str or bytes is passed in, it is returned unchanged. Otherwise the
os.PathLike interface is used to get the path representation. If the
path representation is not str or bytes, TypeError is raised. If the
provided path is not str, bytes, or os.PathLike, TypeError is raised.
"""
if isinstance(path, native_path_types):
return path
# Work from the object's type to match method resolution of other magic
# methods.
path_type = type(path)
try:
path_type_fspath = path_type.__fspath__
except AttributeError:
raise TypeError("expected str, bytes or os.PathLike object, "
"not " + path_type.__name__)
path_repr = path_type_fspath(path)
if isinstance(path_repr, native_path_types):
return path_repr
raise TypeError("expected {}.__fspath__() to return str or bytes, "
"not {}".format(path_type.__name__,
type(path_repr).__name__))
try:
from os import fspath # pylint: disable=unused-import,no-name-in-module
except ImportError:
# if not available, use the Python version as transparently as
# possible
fspath = _fspath
fspath.__name__ = 'fspath'
try:
from os import fsencode # pylint: disable=unused-import,no-name-in-module
except ImportError:
encoding = sys.getfilesystemencoding() or ('utf-8' if not WIN else 'mbcs')
errors = 'strict' if WIN and encoding == 'mbcs' else 'surrogateescape'
# Added in 3.2, so this is for Python 2.7. Note that it doesn't have
# sys.getfilesystemencodeerrors(), which was added in 3.6
def fsencode(filename):
"""Encode filename (an os.PathLike, bytes, or str) to the filesystem
encoding with 'surrogateescape' error handler, return bytes unchanged.
On Windows, use 'strict' error handler if the file system encoding is
'mbcs' (which is the default encoding).
"""
filename = fspath(filename) # Does type-checking of `filename`.
if isinstance(filename, bytes):
return filename
try:
return filename.encode(encoding, errors)
except LookupError:
# Can't encode it, and the error handler doesn't
# exist. Probably on Python 2 with an astral character.
# Not sure how to handle this.
raise UnicodeEncodeError("Can't encode path to filesystem encoding")
## Clocks
try:
# Python 3.3+ (PEP 418)
from time import perf_counter
perf_counter = perf_counter
except ImportError:
import time
if sys.platform == "win32":
perf_counter = time.clock
else:
perf_counter = time.time
|
