The
Best New Features of Python 3.8
=> Parallel filesystem cache for compiled bytecode files
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
https://docs.python.org/3.8/whatsnew/3.8.html
and
https://www.code-sample.com/2017/12/python-interview-questions-and-answers.html
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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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