Guido van Rossum
@gvanrossum
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Python's BDFL-emeritus, Distinguished Engineer at Microsoft, Computer History Fellow, fully vaccinated. Opinions are my own. He/him.
San Francisco Bay Area
Joined August 2008
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Pinned Tweet
Python wins the 2023 NEC C&C Prize.
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I decided that retirement was boring and have joined the Developer Division at Microsoft. To do what? Too many options to say! But it’ll make using Python better for sure (and not just on Windows :-). There’s lots of open source here. Watch this space.
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Yeah, so I helped the Excel team with this. Excited that it's out!
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In my high school senior year I was voted "least likely to invent his own programming language."
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It's bittersweet: I'm leaving
@dropbox
, and am now retired. I've learned a lot during my time as an engineer here -- e.g. type annotations came from this experience -- and I'll miss working here.
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Thanks for all the support (email and Twitter). I'm overwhelmed by the responses and won't be replying to most emails in person (except from core devs) but it's much appreciated. I'm still going to be around in the background!
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Python 4 FAQ.
1. The version after 3.9 is 3.10; in fact it already exists (in github master).
2. If there ever is a version 4, the transition from 3 to 4 will be more like that from 1 to 2 rather than 2 to 3.
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>>> greetings = ["world hello", "nieuwjaar gelukkig", "happy year new"]
>>> for g in greetings:
... words = sorted(g.split())
... print(" ".join(words).title())
...
Hello World
Gelukkig Nieuwjaar
Happy New Year
>>>
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Today's Python history lesson: Python took its control and data structures from ABC, its identifiers, strings and %-string formats from C, and its regular expressions from Perl. But its # comments (and #!) and -c command line flag came from the UNIX v7 shell.
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It's (even more) official: support for Python 2 ends 1/1/2020. Read why, and what you should do:
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Python 3.7.0 is released! Bring out the celebratory libations. Thanks
@baybryj
and a cast of thousands on python-dev and GitHub.
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"Python is designed to deliver an experience that is simple and easy to use. This is only possible through a combination of advanced technologies and sophisticated engineering."
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The 996 work schedule is inhumane.
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The final Python 2 release is out. Thank you
@gutworth
for being the 2.7 release manager during 11 long years. Read the announcement here!
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Got my first COVID-19 shot! Still need to wear mask and social distance of course. Be safe everyone!
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Pattern Matching (PEP 634-636) was merged into cpython master today! Will be in 3.10 alpha 6, to be released Monday.
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Imagine the dread caused by this error:
TypeError: func expected at least 14 arguments, got 0
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Remember that Python 2 will reach end of life on 1/1/2020. For the impact on *your* project, see
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Seen on a T-shirt:
Knock knock
Race condition
Who’s there!
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Python 3.9a6 is out! With new parser (PEP 617), dict|dict (PEP 584), list[int] (PEP 585), str.remove{prefix,suffix}() (PEP 616), and much more! Please test with your favorite packages.
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Me, like you’ve never seen me before (and won’t see again :-)
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“clever boy”
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For folks trying to get their head around PEP 634 (pattern matching), which will land in the next alpha release of 3.10, here's a brief tutorial I wrote: (more concise than the introduction in PEP 636):
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What does this print?
x = 0
y = 0
def f():
x = 1
y = 1
class C:
print(x, y) # What does this print?
x = 2
f()
From (
@kevmod
) Still in Python 3.9!
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Strange how some people are capable to do the Googling needed to find my email address, only to ask a question that could be answered with even less Googling. (Not in reference to any particular Tweet or email, just an observation.)
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46 across: Programming language named for a comedy group.
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@EricIdle
@KansasGrant
Hi
@EricIdle
, author of said "Python" software here. It's open source, which means it's free. It's been 31 years since I chose the name and I'm still a fan of your work! It's "very nice". Many folks working with me in the early days shared my appreciation.
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Who is using Python 3.10 (released two weeks ago)? Any good uses for match/case yet?
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[Repeat so more people are aware of this]
Python 4 FAQ.
1. The version after 3.9 is 3.10; in fact it already exists (in github master).
2. If there ever is a version 4, the transition from 3 to 4 will be more like that from 1 to 2 rather than 2 to 3.
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Python 3.10a6 is about to be released. The docs are already up:
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TIL: When in a video conference, take off your airpods before taking a bathroom break.
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Python's "-Wall" flag is a tribute to Larry Wall and Perl.
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If yo use Python, you're a Pythonista. Please fill out the PSF's annual Python Developers Survey here:
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Random Python History thing: I stole Python's 'elif' from the C Preprocessor.
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Python 3.10.0a5 is now available. Same as always: test the heck out of it, but not in prod!
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Thanks for the birthday wishes everyone. I doubt I'll be around for 0x80.
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Code snippets in Python docs are now explicitly licensed under BSD-zero. That means you can freely copy this code without license or attribution!
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I just discovered that in order to use e.g. "OK Google, play the Beatles on Spotify" I have to enable web & app activity tracking on all my devices. Shame on you Google!
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Looks like soon I will lose the blue checkmark. I can't say I care.
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If you’re using Python type annotations, please ask yourself whether it works when you add ‘from __future__ import annotations’. This will be the default in 3.10 and we need you to prepare for that. (Also, 3.9.0 is now out.)
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Twenty-five years ago I bought a suitcase for a trip to the US, and marked it "GvR Python". Today I am back for six days in Amsterdam with the same suitcase.
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Yes! Python 3.6.0 (final) is released!!! Thanks
@baybryj
and all core devs, contributors and beta testers!
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Random historic note: if I hadn't chosen the __dunder__ naming scheme for Python language internals long ago, dunders would have been an obscure feature of the C preprocessor.
Who knows when, where and by whom the term "dunder" was coined? It wasn't me, and it was years later.
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Article "The Origins of Python" by my mentor, Lambert Meertens.
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A little close to home: :-(
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Python 3.9.2 and 3.8.8 are out! The wonder of free two-day deliveries, indeed. :-)
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Yay type annotations in pytest!
#pytest
6.0 is coming! 🕕
As a major release, it has lots of new features, improvements and bug fixes.
It also has some backwards-incompatible changes and new deprecations.
Check the changelog:
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This year's Turing Award goes to Aho and Ullman, the authors of the very fine Dragon Book. I have a first edition proudly on my bookshelf.
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My UNIX fu is waning. When playing around with the cherry-picker tool I naively typed `alias cp=cherry-picker`. Days later I got a mysterious error when trying to copy a directory. :-)
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Python 3.10 beta 3 is out. Please give it a try with your libraries — don’t get caught unawares when the final release goes out this fall!
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Important presentation tip for
#PyCon
speakers. When using screenshots, use a LIGHT theme. Dark themes are hard to read. Also, use larger fonts in the screenshot. Your audience will thank you! Squintingly,
#pycon2019
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Talk by my coworker (and co core dev) Brandt Bucher on how we plan a JIT for Python 3.13.
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Excited to see notebooks in VS Code learning to fly on their own!
🎉🥳We just released the new open sourced Jupyter extension to bring the power of
@ProjectJupyter
into
@code
! It comes with
@pythonvscode
for Python notebooks, but can also be installed standalone to work with other language kernels.
Check it out 👉
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Python 3.8b4 is out. We need your help testing it, esp. if you maintain a library or package!
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Python influencing JavaScript (again).
@gvanrossum
Real happy about pattern matching; the proposal was so good it helped inform JS's pattern matching proposal!
(source: me, I'm the one who used it to argue for changes in the JS proposal)
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Jacob Kaplan-Moss says: stop using passwords. Use Login with Google/Facebook/etc., or login by email. “Google’s security team is better than yours.” Amen.
#nbpy
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This is amazing. I never thought my baby would have been used for such an important project! (Scanning of Rembrandt's Night Watch.)
@llanga
@ProjectJupyter
5. AsyncIO is great. It's been a joy to hook into
#Jupyter
's async event loop so that I can send/receive messages to the robot, capture sensor data into a growing DataFrame, and run motion control programs in the background while having a free
#IPython
prompt for live analysis.
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Just discovered Hedy, a gradual programming language. It's a new idea on how to teach programming to beginners. Very cool!
@hedycode
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Monday starting 17:00 UTC
@pyblogsal
will be releasing Python 3.11 *live*. Expect cameos by some other core devs. Watch the live stream:
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Read about the Dropbox Client Python 3 migration!
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Umm... why is there a MacBook Pro in my Find My... list that’s in China? I’m not missing any.
@Apple
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My first post on Medium:
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First PyCon in Turkey, in the wonderful city of Istanbul!
The Call for Proposals for PyCon Turkey 2020 will close on Jan 15 at 23:59 UTC. Don't forget to submit your proposal!
PyCon TR 2020 will take place on May 2-3, 2020 in Istanbul. 🇹🇷
#pycontr2020
#pycon
#python
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Python 3.9.0 beta 3 is out now, for your immediate testing. Wait, what happened to beta 2? Interesting story. Read it here: [correct URL this time]
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Cool hack!
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Python 3.7b3 is out! Please test your code with this and help us make 3.7.0 a really solid release. Tons of new stuff to look forward to:
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Pep8 is dead, long live pycodestyle!
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Python 3.11b4 is *finally* released. WE NEED YOU TO TEST YOUR PACKAGES WITH THIS!
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Happy 20th birthday PyGame! A great accomplishment. And now, version 2.0! (And still Python 2.7 backward compatible too!)
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Notebooks in VS Code revamped. ToC, Diffing, Gather, LiveShare, and more. Thanks
@ClaudiaRegio
!
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I just cleaned the clogged drain hoses of our dishwasher. A draining job. I more than ever respect the people who do that work for a living.
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Cool sites about the Python 3 transition: , , ,
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Finally the asyncio docs are not an embarrassment to us all. Thanks
@1st1
,
@WillingCarol
,
@elprans
and
@andrew_svetlov
!
🔥 Big news! 🔥
asyncio documentation has been rewritten from scratch! Read the new version here: .
Huge thanks to
@WillingCarol
,
@elprans
, and
@andrew_svetlov
for support, ideas, and reviews!
Thread 👇
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Amazing. A bash implementation in Python, by my ex-coworker (at Google) Andy Chu.
@oilshell
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@pamelafox
I don’t recall the reason I chose ‘self’, but I imagine it was an act of rebellion against C++ ‘this’. Just like ‘None’ rebelled against C ‘NULL’. Basically just being a little ornery (like naming it after an irreverent tv show instead of a famous scientist or engineer).
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Python 3.6.3, whee!
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Three new Python releases: 3.9.1, 3.10.0a1, and 3.8.7rc1. Test them all, but especially the rc!
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