Python 3.8 即将发布了.

准备升级了....

python 3.8 release date

3.8.0 candidate 2: Monday, 2019-10-07 (if necessary)
3.8.0 final: Monday, 2019-10-14 (assuming a single release candidate)

Features for 3.8 Some of the notable features of Python 3.8 include:

• PEP 570, Positional-only arguments
• PEP 572, Assignment Expressions
• PEP 574, Pickle protocol 5 with out-of-band data
• PEP 578, Runtime audit hooks
• PEP 587, Python Initialization Configuration
• PEP 590, Vectorcall: a fast calling protocol for CPython
• Typing-related: PEP 591 (Final qualifier), PEP 586 (Literal types), and PEP 589 (TypedDict)
• Parallel filesystem cache for compiled bytecode
• Debug builds share ABI as release builds
• f-strings support a handy = specifier for debugging
• continue is now legal in finally: blocks
• on Windows, the default asyncio event loop is now ProactorEventLoop
• on macOS, the spawn start method is now used by default in multiprocessing
• multiprocessing can now use shared memory segments to avoid pickling costs between processes
• typed_ast is merged back to CPython
• LOAD_GLOBAL is now 40% faster
• pickle now uses Protocol 4 by default, improving performance
• There are many other interesting changes, please consult the "What's New" page in the documentation for a full list.