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Diffstat (limited to 'sources/shiboken2/shibokenmodule/support/signature/contextlib36.py')
| -rw-r--r-- | sources/shiboken2/shibokenmodule/support/signature/contextlib36.py | 472 |
1 files changed, 0 insertions, 472 deletions
diff --git a/sources/shiboken2/shibokenmodule/support/signature/contextlib36.py b/sources/shiboken2/shibokenmodule/support/signature/contextlib36.py deleted file mode 100644 index d416eef27..000000000 --- a/sources/shiboken2/shibokenmodule/support/signature/contextlib36.py +++ /dev/null @@ -1,472 +0,0 @@ -# This Python file uses the following encoding: utf-8 -# It has been edited by fix-complaints.py . - -############################################################################# -## -## Copyright (C) 2019 The Qt Company Ltd. -## Contact: https://www.qt.io/licensing/ -## -## This file is part of Qt for Python. -## -## $QT_BEGIN_LICENSE:LGPL$ -## Commercial License Usage -## Licensees holding valid commercial Qt licenses may use this file in -## accordance with the commercial license agreement provided with the -## Software or, alternatively, in accordance with the terms contained in -## a written agreement between you and The Qt Company. For licensing terms -## and conditions see https://www.qt.io/terms-conditions. For further -## information use the contact form at https://www.qt.io/contact-us. -## -## GNU Lesser General Public License Usage -## Alternatively, this file may be used under the terms of the GNU Lesser -## General Public License version 3 as published by the Free Software -## Foundation and appearing in the file LICENSE.LGPL3 included in the -## packaging of this file. Please review the following information to -## ensure the GNU Lesser General Public License version 3 requirements -## will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -## -## GNU General Public License Usage -## Alternatively, this file may be used under the terms of the GNU -## General Public License version 2.0 or (at your option) the GNU General -## Public license version 3 or any later version approved by the KDE Free -## Qt Foundation. The licenses are as published by the Free Software -## Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -## included in the packaging of this file. Please review the following -## information to ensure the GNU General Public License requirements will -## be met: https://www.gnu.org/licenses/gpl-2.0.html and -## https://www.gnu.org/licenses/gpl-3.0.html. -## -## $QT_END_LICENSE$ -## -############################################################################# - -""" -PSF LICENSE AGREEMENT FOR PYTHON 3.7.0 - -1. This LICENSE AGREEMENT is between the Python Software Foundation ("PSF"), and - the Individual or Organization ("Licensee") accessing and otherwise using Python - 3.7.0 software in source or binary form and its associated documentation. - -2. Subject to the terms and conditions of this License Agreement, PSF hereby - grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce, - analyze, test, perform and/or display publicly, prepare derivative works, - distribute, and otherwise use Python 3.7.0 alone or in any derivative - version, provided, however, that PSF's License Agreement and PSF's notice of - copyright, i.e., "Copyright © 2001-2018 Python Software Foundation; All Rights - Reserved" are retained in Python 3.7.0 alone or in any derivative version - prepared by Licensee. - -3. In the event Licensee prepares a derivative work that is based on or - incorporates Python 3.7.0 or any part thereof, and wants to make the - derivative work available to others as provided herein, then Licensee hereby - agrees to include in any such work a brief summary of the changes made to Python - 3.7.0. - -4. PSF is making Python 3.7.0 available to Licensee on an "AS IS" basis. - PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF - EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND DISCLAIMS ANY REPRESENTATION OR - WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE - USE OF PYTHON 3.7.0 WILL NOT INFRINGE ANY THIRD PARTY RIGHTS. - -5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 3.7.0 - FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF - MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 3.7.0, OR ANY DERIVATIVE - THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. - -6. This License Agreement will automatically terminate upon a material breach of - its terms and conditions. - -7. Nothing in this License Agreement shall be deemed to create any relationship - of agency, partnership, or joint venture between PSF and Licensee. This License - Agreement does not grant permission to use PSF trademarks or trade name in a - trademark sense to endorse or promote products or services of Licensee, or any - third party. - -8. By copying, installing or otherwise using Python 3.7.0, Licensee agrees - to be bound by the terms and conditions of this License Agreement. -""" - -"""Utilities for with-statement contexts. See PEP 343.""" -import abc -import sys -import _collections_abc -from collections import deque -from functools import wraps - -__all__ = ["contextmanager", "closing", "AbstractContextManager", - "ContextDecorator", "ExitStack", "redirect_stdout", - "redirect_stderr", "suppress"] - - -class AbstractContextManager(abc.ABC): - - """An abstract base class for context managers.""" - - def __enter__(self): - """Return `self` upon entering the runtime context.""" - return self - - @abc.abstractmethod - def __exit__(self, exc_type, exc_value, traceback): - """Raise any exception triggered within the runtime context.""" - return None - - @classmethod - def __subclasshook__(cls, C): - if cls is AbstractContextManager: - return _collections_abc._check_methods(C, "__enter__", "__exit__") - return NotImplemented - - -class ContextDecorator(object): - "A base class or mixin that enables context managers to work as decorators." - - def _recreate_cm(self): - """Return a recreated instance of self. - - Allows an otherwise one-shot context manager like - _GeneratorContextManager to support use as - a decorator via implicit recreation. - - This is a private interface just for _GeneratorContextManager. - See issue #11647 for details. - """ - return self - - def __call__(self, func): - @wraps(func) - def inner(*args, **kwds): - with self._recreate_cm(): - return func(*args, **kwds) - return inner - - -class _GeneratorContextManager(ContextDecorator, AbstractContextManager): - """Helper for @contextmanager decorator.""" - - def __init__(self, func, args, kwds): - self.gen = func(*args, **kwds) - self.func, self.args, self.kwds = func, args, kwds - # Issue 19330: ensure context manager instances have good docstrings - doc = getattr(func, "__doc__", None) - if doc is None: - doc = type(self).__doc__ - self.__doc__ = doc - # Unfortunately, this still doesn't provide good help output when - # inspecting the created context manager instances, since pydoc - # currently bypasses the instance docstring and shows the docstring - # for the class instead. - # See http://bugs.python.org/issue19404 for more details. - - def _recreate_cm(self): - # _GCM instances are one-shot context managers, so the - # CM must be recreated each time a decorated function is - # called - return self.__class__(self.func, self.args, self.kwds) - - def __enter__(self): - try: - return next(self.gen) - except StopIteration: - raise RuntimeError("generator didn't yield") from None - - def __exit__(self, type, value, traceback): - if type is None: - try: - next(self.gen) - except StopIteration: - return False - else: - raise RuntimeError("generator didn't stop") - else: - if value is None: - # Need to force instantiation so we can reliably - # tell if we get the same exception back - value = type() - try: - self.gen.throw(type, value, traceback) - except StopIteration as exc: - # Suppress StopIteration *unless* it's the same exception that - # was passed to throw(). This prevents a StopIteration - # raised inside the "with" statement from being suppressed. - return exc is not value - except RuntimeError as exc: - # Don't re-raise the passed in exception. (issue27122) - if exc is value: - return False - # Likewise, avoid suppressing if a StopIteration exception - # was passed to throw() and later wrapped into a RuntimeError - # (see PEP 479). - if type is StopIteration and exc.__cause__ is value: - return False - raise - except: - # only re-raise if it's *not* the exception that was - # passed to throw(), because __exit__() must not raise - # an exception unless __exit__() itself failed. But throw() - # has to raise the exception to signal propagation, so this - # fixes the impedance mismatch between the throw() protocol - # and the __exit__() protocol. - # - if sys.exc_info()[1] is value: - return False - raise - raise RuntimeError("generator didn't stop after throw()") - - -def contextmanager(func): - """@contextmanager decorator. - - Typical usage: - - @contextmanager - def some_generator(<arguments>): - <setup> - try: - yield <value> - finally: - <cleanup> - - This makes this: - - with some_generator(<arguments>) as <variable>: - <body> - - equivalent to this: - - <setup> - try: - <variable> = <value> - <body> - finally: - <cleanup> - - """ - @wraps(func) - def helper(*args, **kwds): - return _GeneratorContextManager(func, args, kwds) - return helper - - -class closing(AbstractContextManager): - """Context to automatically close something at the end of a block. - - Code like this: - - with closing(<module>.open(<arguments>)) as f: - <block> - - is equivalent to this: - - f = <module>.open(<arguments>) - try: - <block> - finally: - f.close() - - """ - def __init__(self, thing): - self.thing = thing - def __enter__(self): - return self.thing - def __exit__(self, *exc_info): - self.thing.close() - - -class _RedirectStream(AbstractContextManager): - - _stream = None - - def __init__(self, new_target): - self._new_target = new_target - # We use a list of old targets to make this CM re-entrant - self._old_targets = [] - - def __enter__(self): - self._old_targets.append(getattr(sys, self._stream)) - setattr(sys, self._stream, self._new_target) - return self._new_target - - def __exit__(self, exctype, excinst, exctb): - setattr(sys, self._stream, self._old_targets.pop()) - - -class redirect_stdout(_RedirectStream): - """Context manager for temporarily redirecting stdout to another file. - - # How to send help() to stderr - with redirect_stdout(sys.stderr): - help(dir) - - # How to write help() to a file - with open('help.txt', 'w') as f: - with redirect_stdout(f): - help(pow) - """ - - _stream = "stdout" - - -class redirect_stderr(_RedirectStream): - """Context manager for temporarily redirecting stderr to another file.""" - - _stream = "stderr" - - -class suppress(AbstractContextManager): - """Context manager to suppress specified exceptions - - After the exception is suppressed, execution proceeds with the next - statement following the with statement. - - with suppress(FileNotFoundError): - os.remove(somefile) - # Execution still resumes here if the file was already removed - """ - - def __init__(self, *exceptions): - self._exceptions = exceptions - - def __enter__(self): - pass - - def __exit__(self, exctype, excinst, exctb): - # Unlike isinstance and issubclass, CPython exception handling - # currently only looks at the concrete type hierarchy (ignoring - # the instance and subclass checking hooks). While Guido considers - # that a bug rather than a feature, it's a fairly hard one to fix - # due to various internal implementation details. suppress provides - # the simpler issubclass based semantics, rather than trying to - # exactly reproduce the limitations of the CPython interpreter. - # - # See http://bugs.python.org/issue12029 for more details - return exctype is not None and issubclass(exctype, self._exceptions) - - -# Inspired by discussions on http://bugs.python.org/issue13585 -class ExitStack(AbstractContextManager): - """Context manager for dynamic management of a stack of exit callbacks - - For example: - - with ExitStack() as stack: - files = [stack.enter_context(open(fname)) for fname in filenames] - # All opened files will automatically be closed at the end of - # the with statement, even if attempts to open files later - # in the list raise an exception - - """ - def __init__(self): - self._exit_callbacks = deque() - - def pop_all(self): - """Preserve the context stack by transferring it to a new instance""" - new_stack = type(self)() - new_stack._exit_callbacks = self._exit_callbacks - self._exit_callbacks = deque() - return new_stack - - def _push_cm_exit(self, cm, cm_exit): - """Helper to correctly register callbacks to __exit__ methods""" - def _exit_wrapper(*exc_details): - return cm_exit(cm, *exc_details) - _exit_wrapper.__self__ = cm - self.push(_exit_wrapper) - - def push(self, exit): - """Registers a callback with the standard __exit__ method signature - - Can suppress exceptions the same way __exit__ methods can. - - Also accepts any object with an __exit__ method (registering a call - to the method instead of the object itself) - """ - # We use an unbound method rather than a bound method to follow - # the standard lookup behavior for special methods - _cb_type = type(exit) - try: - exit_method = _cb_type.__exit__ - except AttributeError: - # Not a context manager, so assume its a callable - self._exit_callbacks.append(exit) - else: - self._push_cm_exit(exit, exit_method) - return exit # Allow use as a decorator - - def callback(self, callback, *args, **kwds): - """Registers an arbitrary callback and arguments. - - Cannot suppress exceptions. - """ - def _exit_wrapper(exc_type, exc, tb): - callback(*args, **kwds) - # We changed the signature, so using @wraps is not appropriate, but - # setting __wrapped__ may still help with introspection - _exit_wrapper.__wrapped__ = callback - self.push(_exit_wrapper) - return callback # Allow use as a decorator - - def enter_context(self, cm): - """Enters the supplied context manager - - If successful, also pushes its __exit__ method as a callback and - returns the result of the __enter__ method. - """ - # We look up the special methods on the type to match the with statement - _cm_type = type(cm) - _exit = _cm_type.__exit__ - result = _cm_type.__enter__(cm) - self._push_cm_exit(cm, _exit) - return result - - def close(self): - """Immediately unwind the context stack""" - self.__exit__(None, None, None) - - def __exit__(self, *exc_details): - received_exc = exc_details[0] is not None - - # We manipulate the exception state so it behaves as though - # we were actually nesting multiple with statements - frame_exc = sys.exc_info()[1] - def _fix_exception_context(new_exc, old_exc): - # Context may not be correct, so find the end of the chain - while 1: - exc_context = new_exc.__context__ - if exc_context is old_exc: - # Context is already set correctly (see issue 20317) - return - if exc_context is None or exc_context is frame_exc: - break - new_exc = exc_context - # Change the end of the chain to point to the exception - # we expect it to reference - new_exc.__context__ = old_exc - - # Callbacks are invoked in LIFO order to match the behavior of - # nested context managers - suppressed_exc = False - pending_raise = False - while self._exit_callbacks: - cb = self._exit_callbacks.pop() - try: - if cb(*exc_details): - suppressed_exc = True - pending_raise = False - exc_details = (None, None, None) - except: - new_exc_details = sys.exc_info() - # simulate the stack of exceptions by setting the context - _fix_exception_context(new_exc_details[1], exc_details[1]) - pending_raise = True - exc_details = new_exc_details - if pending_raise: - try: - # bare "raise exc_details[1]" replaces our carefully - # set-up context - fixed_ctx = exc_details[1].__context__ - raise exc_details[1] - except BaseException: - exc_details[1].__context__ = fixed_ctx - raise - return received_exc and suppressed_exc |