What's new in python 3.8? | Python 3.8 New Features | Edureka
1 like248 views
The document outlines new features and modules introduced in Python 3.8, including assignment expressions, positional-only parameters, and a new parallel filesystem cache setting. It mentions enhancements such as support for f-strings, run-time audit hooks, and a new 'importlib.metadata' module for reading package metadata. Additionally, it covers improvements in the pickle protocol and various syntax and typing enhancements.
What's new in python 3.8? | Python 3.8 New Features | Edureka
- 1. Copyright © 2017, edureka and/or its affiliates. All rights reserved.
- 2. New Features New Modules www.edureka.co/python Other Language Changes
- 4. Assignment Expressions It is an assignment operator “:=” that is used to assign values to a variable as a larger part of the expression www.edureka.co/python
- 5. Positional-Only Parameters There is a new function parameter syntax “/”, It is used to indicate that some parameters can be used positionally and cannot be used as keywords. /A B www.edureka.co/python
- 6. Parallel Filesystem Cache There is a new PYTHONPYCACHEPREFIX setting in python 3.8, it configures the implicit bytecode cache to use a separate parallel filesystem tree. www.edureka.co/python
- 7. Debug Build With Python 3.8, the same ABI is used whether it is built in debug mode or in release mode. When Python used UNIX in debug mode, it is now possible to load the C extensions that are built in release mode and the extensions build using the stable ABI. www.edureka.co/python
- 8. f-Strings Support Python 3.8 has added a = specifier for f-strings. www.edureka.co/python
- 9. Run-time Audit Hooks An audit hook in an application is an exit point that allows the auditor to add the modules subsequently. Audit Hook The verified open hook allows python embedders to integrate with operating system support when launching scripts or importing Python code. Verified Open Hook www.edureka.co/python
- 10. Initialization Configuration Python 3.8 adds new C API to configure the initialization for finer control and better error reporting. The following new structures are added. PyConfig PyPreConfig PyStatus PyWideStringList www.edureka.co/python
- 11. Vectorcall It is a fast calling protocol for CPython, It is added to the Python/C API. It is basically meant to formalize the existing optimizations that were already made for various classes. www.edureka.co/python
- 12. Pickle Protocol 5 • It covers the extra metadata needed for out-of- band data buffers • Pickle 5 has a new PickleBuffer type for __reduce_ex__ implementations to return out-of-band data buffers • It has a new buffer_callback parameter when pickling, to handle out-of-band data buffers • It also has a new buffers parameter when unpickling to provide out-of-band data buffers. www.edureka.co/python
- 14. New Modules Importlib.metadata There has been an addition of a new module in Python 3.8, the new importlib.metadata module provides provisional support for reading metadata from third party packages.
- 17. Other Language Changes Reversible Dictionaries Reversed() A : 10 B : 20, B : 20 A : 10,
- 20. Copyright © 2017, edureka and/or its affiliates. All rights reserved. www.edureka.co