96 lines
10 KiB
ReStructuredText
96 lines
10 KiB
ReStructuredText
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.. _python_37:
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Python 3.7
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==========
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New Features:
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| **Features:** | **Status** |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 538 <https://www.python.org/dev/peps/pep-0538/>`_ | Coercing the legacy C locale to a UTF-8 based | |
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| | locale | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 539 <https://www.python.org/dev/peps/pep-0539/>`_ | A New C-API for Thread-Local Storage in CPython | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 540 <https://www.python.org/dev/peps/pep-0540/>`_ | UTF-8 mode | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 552 <https://www.python.org/dev/peps/pep-0552/>`_ | Deterministic pyc | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 553 <https://www.python.org/dev/peps/pep-0553/>`_ | Built-in breakpoint() | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 557 <https://www.python.org/dev/peps/pep-0557/>`_ | Data Classes | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 560 <https://www.python.org/dev/peps/pep-0560/>`_ | Core support for typing module and generic types | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 562 <https://www.python.org/dev/peps/pep-0562/>`_ | Module __getattr__ and __dir__ | Partially done |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 563 <https://www.python.org/dev/peps/pep-0563/>`_ | Postponed Evaluation of Annotations | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 564 <https://www.python.org/dev/peps/pep-0564/>`_ | Time functions with nanosecond resolution | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 565 <https://www.python.org/dev/peps/pep-0565/>`_ | Show DeprecationWarning in __main__ | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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| `PEP 567 <https://www.python.org/dev/peps/pep-0567/>`_ | Context Variables | |
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+--------------------------------------------------------+--------------------------------------------------+----------------+
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Other Language Changes:
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+----------------------------------------------------------------------------------------------------------+----------------+
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| async and await are now reserved keywords | Completed |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| dict objects must preserve insertion-order | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| More than 255 arguments can now be passed to a function; a function can now have more than 255 parameters| |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| bytes.fromhex() and bytearray.fromhex() now ignore all ASCII whitespace, not only spaces | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| str, bytes, and bytearray gained support for the new isascii() method, which can be used to test if a | |
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| string or bytes contain only the ASCII characters | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| ImportError now displays module name and module __file__ path whenfrom ... import ... fails | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| Circular imports involving absolute imports with binding a submodule to a name are now supported | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| object.__format__(x, '') is now equivalent to str(x) rather than format(str(self), '') | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| In order to better support dynamic creation of stack traces, types.TracebackType can now be instantiated | |
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| from Python code, and the tb_next attribute on tracebacks is now writable | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| When using the -m switch, sys.path[0] is now eagerly expanded to the full starting directory path, rather| |
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| than being left as the empty directory (which allows imports from the current working directory at the | |
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| time when an import occurs) | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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| The new -X importtime option or the PYTHONPROFILEIMPORTTIME environment variable can be used to show the | |
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| timing of each module import | |
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+----------------------------------------------------------------------------------------------------------+----------------+
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Changes to built-in modules:
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+------------------------------------------------------------------------------------------------------------+----------------+
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| `asyncio <https://docs.python.org/3/whatsnew/3.7.html#asyncio>`_ | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| asyncio (many, may need a separate ticket) | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| `gc <https://docs.python.org/3/whatsnew/3.7.html#gc>`_ | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| New features include *gc.freeze()*, *gc.unfreeze()*, *gc-get_freeze_count* | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| `math <https://docs.python.org/3/whatsnew/3.7.html#math>`_ | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| math.remainder() added to implement IEEE 754-style remainder | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| `re <https://docs.python.org/3/whatsnew/3.7.html#re>`_ | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| A number of tidy up features including better support for splitting on empty strings and copy support for | |
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| compiled expressions and match objects | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| `sys <https://docs.python.org/3/whatsnew/3.7.html#sys>`_ | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| sys.breakpointhook() added. sys.get(/set)_coroutine_origin_tracking_depth() added | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| `time <https://docs.python.org/3/whatsnew/3.7.html#time>`_ | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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| Mostly updates to support nanosecond resolution in PEP564, see above | |
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+------------------------------------------------------------------------------------------------------------+----------------+
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