New Features of Python 3.8

What’s New in Python 3.8? | Best New Features of Python 3.8

The Best New Features of Python 3.8

The Python 3.8 is the latest version and it used for scripting and automation to machine learning and web development.

Let’s explains one-by-one the Python 3.8 new features -
=> Assignment expressions

if (n := len(a)) > 10:
    print(f"List is too long ({n} elements, expected <= 10)")
            
=> Positional-only parameters

def pow(x, y, z=None, /):
    r = x**y
    if z is not None:
        r %= z
    return r


=> Parallel filesystem cache for compiled bytecode files
=> Debug build uses the same ABI as release build
=> A fast calling protocol for CPython
=> The subprocess.Popen() can now use os.posix_spawn() in some cases for better performance
=> The statistics.mode() function no longer raises an exception when given multimodal data

=> f-strings now support = for quick and easy debugging
x = 3
print(f'{x*9 + 15=}')

=> Improved Modules - ast, asyncio, builtins, collections, ctypes, functools, datetime, gettext, inspect, idlelib and IDLE, and json.tool

=> Python Initialization providing finer control on the whole configuration and better error reporting.
=> Python New Structures:
1.      PyConfig
2.      PyPreConfig
3.      PyStatus
4.      PyWideStringList

=> Python New functions:
1.      PyConfig_Clear()
2.      PyConfig_InitIsolatedConfig()
3.      PyConfig_InitPythonConfig()
4.      PyConfig_Read()
5.      PyConfig_SetArgv()
6.      PyConfig_SetBytesArgv()
7.      PyConfig_SetBytesString()
8.      PyConfig_SetString()
9.      PyPreConfig_InitIsolatedConfig()
10. PyPreConfig_InitPythonConfig()
11. PyStatus_Error()
12. PyStatus_Exception()
13. PyStatus_Exit()
14. PyStatus_IsError()
15. PyStatus_IsExit()
16. PyStatus_NoMemory()
17. PyStatus_Ok()
18. PyWideStringList_Append()
19. PyWideStringList_Insert()
20. Py_BytesMain()
21. Py_ExitStatusException()
22. Py_InitializeFromConfig()
23. Py_PreInitialize()
24. Py_PreInitializeFromArgs()
25. Py_PreInitializeFromBytesArgs()
26. Py_RunMain()
=> The Py_DEPRECATED() macro has been implemented for MSVC. The macro now must be placed before the symbol name.

Example:
Py_DEPRECATED(3.8) PyAPI_FUNC(int) Py_OldFunction(void);

Explore in detail
https://docs.python.org/3.8/whatsnew/3.8.html

and 

https://www.code-sample.com/2017/12/python-interview-questions-and-answers.html
ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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