Python 3.9.0 announces

Python 3.9 is now officially available! by Łukasz Langa 22h10 UTC+2

See also

• https://fediverse.org/llanga

#Python 3.9 is now officially available! Get it here: https://python.org/downloads/release/python-390/

Released on time, on budget, great features and optimizations, a million household uses! Easily our best release ever!

That is until 3.10 next year. But you go pester the new RM @pyblogsal for THAT!

Python 3.9: Cool New Features for You to Try by Geir Arne Hjelle

• Python 3.9: Cool New Features for You to Try by Geir Arne Hjelle
  • About Geir Arne Hjelle
    • To see
  • Proper Time Zone Support ( zoneinfo module , PEP-0615)
    • Accessing Time Zones
    • Investigating Time Zones
    • Using Best Practices
  • Simpler Updating of Dictionaries (PEP-0584)
  • More Flexible Decorators
  • Annotated Type Hints
  • A More Powerful Python Parser (PEP-0617)
  • Other Pretty Cool Features
    • String Prefix and Suffix (PEP 6016)
    • Type Hint Lists and Dictionaries Directly (list + dict, PEP-0585)
    • Topological Sort
  • Greatest Common Divisor (GCD) and Least Common Multiple (LCM)
  • New HTTP Status Codes
  • Removal of Deprecated Compatibility Code
  • Conclusion

Python 3.9 par Serdar Yegulalp Serdar Yegulalp

• Python 3.9 : des améliorations et des innovations par Serdar Yegulalp (adaptation Jean Elyan)
  • Introduction
  • Adoption d’un cycle annuel de publication
  • Python devient plus rapide par défaut
    • Liens parser
  • Plus de chaînes de caractères et de fonctions de dictionnaire
    • Chaines de caractères
    • Dictionnaires
  • Les décorateurs perdent certaines restrictions
  • Nouvelles opérations de type
    • list + dict
    • Annotations
  • Améliorations des classes internes
  • Autres changements apportés à Python 3.9

Python 3.9: What’s New by Jan Giacomelli

• Python 3.9: What’s New by Jan Giacomelli
  • Jan Giacomelli
  • Introduction
  • Development Cycle
  • Dictionary Unions
  • Updating dictionaries
  • Generating Random Bytes
  • String Methods removeprefix + removesuffix (PEP-0616)
    • removeprefix
    • removesuffix
  • IANA Timezone Support ( zoneinfo module )
  • Generic Type Annotations (list + dict, PEP-0585)
  • Canceling Concurrent Futures
  • ImportError
  • String Replace Fix, (bug 28029)
  • New Python Parser (PEP-0617)
  • Performance ( vectorcall protocol )
  • Conclusion

Sortie de Python 3.9 par Antoine Rozo (entwanne)

• Sortie de Python 3.9 par Antoine Rozo
  • Antoine Rozo
  • Introduction
  • Méthodes removeprefix et removesuffix des chaînes de caractères (PEP 616)
  • Opérations ensemblistes sur les dictionnaires (PEP-0584)
  • Module zoneinfo ( zoneinfo module , PEP-0615)
  • Module graphlib
  • Types génériques natifs (list + dict, PEP-0585)
  • Refonte de l’analyseur syntaxique (PEP-0617)
  • Avertissements de dépréciation
  • Autres changements

10 Awesome Python 3.9 Features by Farhad Malik

• 10 Awesome Python 3.9 Features by Farhad Malik
  • Farhad Malik
  • Introduction
    • In A Nutshell
  • 2. Feature New Flexible High Performant PEG-Based Parser (PEP-0617)
    • Detailed Explanation
  • 6. Feature: Ability To Cancel Concurrent Futures (issue 39349, Add “cancel_futures” parameter to concurrent.futures.Executor.shutdown())
    • Explanation
  • 7. Feature: AsyncIO and multiprocessing Improvements (issue 30966, Add multiprocessing.queues.SimpleQueue.close() )
  • 8. Feature: Consistent Package Import Errors (issue 37444)

Video top 10 new things in python3.9 (beginner-intermediate) anthony explains #093 by Anthony Sottile

See also

• https://www.youtube.com/watch?v=Dtw0QJhepV0

• https://fediverse.org/codewithanthony

• https://fediverse.org/codewithanthony/status/1313177904692387842?s=20

today I discuss and demo my top favorite new things in python3.9!

links:

• getting python3.9 early via deadsnakes: https://launchpad.net/~deadsnakes/+ar …

• what’s new in python3.9: https://docs.python.org/3.9/whatsnew/3.9.html

• stdin / stdout / stderr video: https://www.youtube.com/watch?v=5za6e …

• decorators: https://www.youtube.com/watch?v=WDMr6 …

• 0:00 - (intro) / how I have python3.9 already

• 01:18 - builtin generic types (for type annotations)

• 03:05 - dictionary merge operators

• 04:58 - str.removeprefix / str.removesuffix

sys.stderr is now line buffered everywhere

• 06:38 - sys.stderr is now line buffered everywhere

ast.unparse function

• 08:30 - ast.unparse function

• 10:00 - new PEG parser and secret bonus new with syntax

__file__ of interactive scripts is now an absolute path

• 13:13 - __file__ of interactive scripts is now an absolute path

new functions in curses for tabsize / escdelay

• 14:37 - new functions in curses for tabsize / escdelay

decorators can be any expression

• 15:45 - decorators can be any expression

new modules (zoneinfo, graphlib)

• 17:00 - new modules (zoneinfo, graphlib)