Python3.7 免安装版

+++++++++++ Python News +++++++++++ What's New in Python 3.7.0 final? ================================= *Release date: 2018-06-27* Library ------- - bpo-33851: Fix :func:`ast.get_docstring` for a node that lacks a docstring. C API ----- - bpo-33932: Calling Py_Initialize() twice does nothing, instead of failing with a fatal error: restore the Python 3.6 behaviour. What's New in Python 3.7.0 release candidate 1? =============================================== *Release date: 2018-06-12* Core and Builtins ----------------- - bpo-33803: Fix a crash in hamt.c caused by enabling GC tracking for an object that hadn't all of its fields set to NULL. - bpo-33706: Fix a crash in Python initialization when parsing the command line options. Thanks Christoph Gohlke for the bug report and the fix! - bpo-30654: Fixed reset of the SIGINT handler to SIG_DFL on interpreter shutdown even when there was a custom handler set previously. Patch by Philipp Kerling. - bpo-31849: Fix signed/unsigned comparison warning in pyhash.c. Library ------- - bpo-30167: Prevent site.main() exception if PYTHONSTARTUP is set. Patch by Steve Weber. - bpo-33812: Datetime instance d with non-None tzinfo, but with d.tzinfo.utcoffset(d) returning None is now treated as naive by the astimezone() method. - bpo-30805: Avoid race condition with debug logging - bpo-33694: asyncio: Fix a race condition causing data loss on pause_reading()/resume_reading() when using the ProactorEventLoop. - bpo-32493: Correct test for ``uuid_enc_be`` availability in ``configure.ac``. Patch by Michael Felt. - bpo-33792: Add asyncio.WindowsSelectorEventLoopPolicy and asyncio.WindowsProactorEventLoopPolicy. - bpo-33778: Update ``unicodedata``'s database to Unicode version 11.0.0. - bpo-33770: improve base64 exception message for encoded inputs of invalid length - bpo-33769: asyncio/start_tls: Fix error message; cancel callbacks in case of an unhandled error; mark SSLTransport as closed if it is aborted. - bpo-33767: The concatenation (``+``) and repetition (``*``) sequence operations now raise :exc:`TypeError` instead of :exc:`SystemError` when performed on :class:`mmap.mmap` objects. Patch by Zackery Spytz. - bpo-33734: asyncio/ssl: Fix AttributeError, increase default handshake timeout - bpo-11874: Use a better regex when breaking usage into wrappable parts. Avoids bogus assertion errors from custom metavar strings. - bpo-33582: Emit a deprecation warning for inspect.formatargspec Documentation ------------- - bpo-33409: Clarified the relationship between PEP 538's PYTHONCOERCECLOCALE and PEP 540's PYTHONUTF8 mode. - bpo-33736: Improve the documentation of :func:`asyncio.open_connection`, :func:`asyncio.start_server` and their UNIX socket counterparts. - bpo-31432: Clarify meaning of CERT_NONE, CERT_OPTIONAL, and CERT_REQUIRED flags for ssl.SSLContext.verify_mode. Build ----- - bpo-5755: Move ``-Wstrict-prototypes`` option to ``CFLAGS_NODIST`` from ``OPT``. This option emitted annoying warnings when building extension modules written in C++. Windows ------- - bpo-33720: Reduces maximum marshal recursion depth on release builds. IDLE ---- - bpo-33656: On Windows, add API call saying that tk scales for DPI. On Windows 8.1+ or 10, with DPI compatibility properties of the Python binary unchanged, and a monitor resolution greater than 96 DPI, this should make text and lines sharper. It should otherwise have no effect. - bpo-33768: Clicking on a context line moves that line to the top of the editor window. - bpo-33763: IDLE: Use read-only text widget for code context instead of label widget. - bpo-33664: Scroll IDLE editor text by lines. Previously, the mouse wheel and scrollbar slider moved text by a fixed number of pixels, resulting in partial lines at the top of the editor box. The change also applies to the shell and grep output windows, but not to read-only text views. - bpo-33679: Enable theme-specific color configuration for Code Context. Use the Highlights tab to see the setting for built-in themes or add settings to custom themes. - bpo-33642: Display up to maxlines non-blank lines for Code Context. If there is no current context, show a single blank line. What's New in Python 3.7.0 beta 5? ================================== *Release date: 2018-05-30* Core and Builtins ----------------- - bpo-33622: Fixed a leak when the garbage collector fails to add an object with the ``__del__`` method or referenced by it into the :data:`gc.garbage` list. :c:func:`PyGC_Collect` can now be called when an exception is set and preserves it. - bpo-33509: Fix module_globals parameter of warnings.warn_explicit(): don't crash if module_globals is not a dict. - bpo-20104: The new `os.posix_spawn` added in 3.7.0b1 was removed as we are still working on what the API should look like. Expect this in 3.8 instead. - bpo-33475: Fixed miscellaneous bugs in converting annotations to strings and optimized parentheses in the string representation. - bpo-33391: Fix a leak in set_symmetric_difference(). - bpo-28055: Fix unaligned accesses in siphash24(). Patch by Rolf Eike Beer. - bpo-32911: Due to unexpected compatibility issues discovered during downstream beta testing, reverted :issue:`29463`. ``docstring`` field is removed from Module, ClassDef, FunctionDef, and AsyncFunctionDef ast nodes which was added in 3.7a1. Docstring expression is restored as a first statement in their body. Based on patch by Inada Naoki. - bpo-21983: Fix a crash in `ctypes.cast()` in case the type argument is a ctypes structured data type. Patch by Eryk Sun and Oren Milman. Library ------- - bpo-32751: When cancelling the task due to a timeout, :meth:`asyncio.wait_for` will now wait until the cancellation is complete. - bpo-32684: Fix gather to propagate cancellation of itself even with return_exceptions. - bpo-33654: Support protocol type switching in SSLTransport.set_protocol(). - bpo-33674: Pause the transport as early as possible to further reduce the risk of data_received() being called before connection_made(). - bpo-33674: Fix a race condition in SSLProtocol.connection_made() of asyncio.sslproto: start immediately the handshake instead of using call_soon(). Previously, data_received() could be called before the handshake started, causing the handshake to hang or fail. - bpo-31467: Fixed bug where calling write_eof() on a _SelectorSocketTransport after it's already closed raises AttributeError. - bpo-32610: Make asyncio.all_tasks() return only pending tasks. - bpo-32410: Avoid blocking on file IO in sendfile fallback code - bpo-33469: Fix RuntimeError after closing loop that used run_in_executor - bpo-33672: Fix Task.__repr__ crash with Cython's bogus coroutines - bpo-33654: Fix transport.set_protocol() to support switching between asyncio.Protocol and asyncio.BufferedProtocol. Fix loop.start_tls() to work with asyncio.BufferedProtocols. - bpo-33652: Pickles of type variables and subscripted generics are now future-proof and compatible with older Python versions. - bpo-32493: Fixed :func:`uuid.uuid1` on FreeBSD. - bpo-33618: Finalize and document preliminary and experimental TLS 1.3 support with OpenSSL 1.1.1 - bpo-33623: Fix possible SIGSGV when asyncio.Future is created in __del__ - bpo-30877: Fixed a bug in the Python implementation of the JSON decoder that prevented the cache of parsed strings from clearing after finishing the decoding. Based on patch by c-fos. - bpo-33570: Change TLS 1.3 cipher suite settings for compatibility with OpenSSL 1.1.1-pre6 and newer. OpenSSL 1.1.1 will have TLS 1.3 cipers enabled by default. - bpo-28556: Do not sim