Asynchronous IO Support for Core and ORM
SQLAlchemy 1.4 now supports Python asyncio-compatible database drivers using an all-new asyncio front-end interface to Connection for Core usage as well as Session for ORM use, using the AsyncConnection and AsyncSession objects.
https://docs.sqlalchemy.org/en/14/changelog/migration_14.html#asynchronous-io-support-for-core-and-orm
SQLAlchemy 1.4 now supports Python asyncio-compatible database drivers using an all-new asyncio front-end interface to Connection for Core usage as well as Session for ORM use, using the AsyncConnection and AsyncSession objects.
https://docs.sqlalchemy.org/en/14/changelog/migration_14.html#asynchronous-io-support-for-core-and-orm
Forwarded from 🇺🇦 Go for two :)
Note #71 The seven rules of a great Git commit message
1. Separate subject from body with a blank line
2. Limit the subject line to 50 characters
3. Capitalize the subject line
4. Do not end the subject line with a period
5. Use the imperative mood in the subject line
6. Wrap the body at 72 characters
7. Use the body to explain what and why vs. how
https://chris.beams.io/posts/git-commit/
1. Separate subject from body with a blank line
2. Limit the subject line to 50 characters
3. Capitalize the subject line
4. Do not end the subject line with a period
5. Use the imperative mood in the subject line
6. Wrap the body at 72 characters
7. Use the body to explain what and why vs. how
https://chris.beams.io/posts/git-commit/
Hypermodern Python 👩🚀 🐍
Chapter 1: Setup
Chapter 2: Testing
Chapter 3: Linting
Chapter 4: Typing
Chapter 5: Documentation
Chapter 6: CI/CD
https://cjolowicz.github.io/posts/hypermodern-python-01-setup/
Chapter 1: Setup
Chapter 2: Testing
Chapter 3: Linting
Chapter 4: Typing
Chapter 5: Documentation
Chapter 6: CI/CD
https://cjolowicz.github.io/posts/hypermodern-python-01-setup/
Releasing pip 20.3, featuring new dependency resolver
https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html
https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html
Python Software Foundation Blog
Releasing pip 20.3, featuring new dependency resolver
On behalf of the Python Packaging Authority and the pip team, I am pleased to announce that we have just released pip 20.3 , a new versio...
Interesting thread how to solve interview problem https://twitter.com/al_grigor/status/1357028887209902088?s=21
Twitter
Alexey Grigorev
Most candidates cannot solve this interview problem: 🔸 Input: "aaaabbbcca" 🔸 Output: [("a", 4), ("b", 3), ("c", 2), ("a", 1)] Write a function that converts the input to the output I ask it in the screening interview and give it 25 minutes How would you solve…
Armin dislikes new PEP regarding structural pattern matching https://twitter.com/mitsuhiko/status/1359263135304187910
btw PEP has been approved!
https://www.python.org/dev/peps/pep-0636/
btw PEP has been approved!
https://www.python.org/dev/peps/pep-0636/
Twitter
Armin Ronacher
I really, really, really don't want to be dismissive of all the new python language features but it's hard not to see faults in PEPs like this: https://t.co/fIvSTSEcxl — pattern matching is awesome, but only when the language is built for it.
I can't recall where I saw this originally, but you can use the spaceship operator "--0--" to turn floor division into ceiling division:
>>> 12//5
2
>>> --0-- 12//5
3
There's also the ++0++ operator when you want to emphasize that you really *do* mean floor division:
>>> ++0++ 12//5
2
from https://bugs.python.org/issue43255#msg387248
But yes, -(-n // d) is the easy (if a little bit cryptic) way to get the ceiling of n / d.
>>> 12//5
2
>>> --0-- 12//5
3
There's also the ++0++ operator when you want to emphasize that you really *do* mean floor division:
>>> ++0++ 12//5
2
from https://bugs.python.org/issue43255#msg387248
But yes, -(-n // d) is the easy (if a little bit cryptic) way to get the ceiling of n / d.
🇺🇦 Python Programming Сhallenges
I can't recall where I saw this originally, but you can use the spaceship operator "--0--" to turn floor division into ceiling division: >>> 12//5 2 >>> --0-- 12//5 3 There's also the ++0++ operator when you want to emphasize that you really *do* mean floor…
It's just a trick
It's because unary minus is right-associative and binds tighter than binary minus which is left-associative
-12 // 5 => - 3
- (-12 // 5) => +3
The rest is just putting 0 at the start:
--0 == 0
and --0--12//5 is parsed as
-(-(0)) - (- (12 // 5))
from Twitter https://twitter.com/ericpromislow/status/1362475189125095425?s=21
It's because unary minus is right-associative and binds tighter than binary minus which is left-associative
-12 // 5 => - 3
- (-12 // 5) => +3
The rest is just putting 0 at the start:
--0 == 0
and --0--12//5 is parsed as
-(-(0)) - (- (12 // 5))
from Twitter https://twitter.com/ericpromislow/status/1362475189125095425?s=21
Twitter
ericpromislow
@professorcraven @VictorStinner @nedbat It's just a trick It's because unary minus is right-associative and binds tighter than binary minus which is left-associative -12 // 5 => - 3 - (-12 // 5) => +3 The rest is just putting 0 at the start: --0 == 0 and…
Forwarded from 🇺🇦 Go for two :)
Performance comparison: counting words in Python, Go, C++, C, AWK, Forth, and Rust
https://benhoyt.com/writings/count-words/
https://benhoyt.com/writings/count-words/
Benhoyt
Performance comparison: counting words in Python, Go, C++, C, AWK, Forth, and Rust
Performance comparison of counting and sorting word frequencies in various languages (Python, Go, C++, C, AWK, Forth, and Rust)
blue is a somewhat less uncompromising code formatter than black, the OG of Python formatters.
https://github.com/grantjenks/blue
https://github.com/grantjenks/blue
GitHub
GitHub - grantjenks/blue: The slightly less uncompromising Python code formatter.
The slightly less uncompromising Python code formatter. - grantjenks/blue
https://talkpython.fm/episodes/show/332/robust-python is a really interesting episode, and resonates really strongly with me for how to write good/maintainable/robust code
talkpython.fm
Robust Python
Does it seem like your Python projects are getting bigger and bigger? Are you feeling the pain as your codebase expands and gets tougher to debug and maintain? Patrick Viafore is here to help us write more maintainable, longer-lived, and more enjoyable Python…
Forwarded from 🇺🇦 Go for two :)
How to Make Your Code Reviewer Fall in Love with You:
1. Review your own code first
2. Write a clear change list description
3. Automate the easy stuff
4. Answer questions with the code itself
5. Narrowly scope changes
6. Separate functional and non-functional changes
7. Break up large change lists
8. Respond graciously to critiques
9. Be patient when your reviewer is wrong
10. Communicate your responses explicitly
11. Artfully solicit missing information
12. Award all ties to your reviewer
13. Minimize lag between rounds of review
https://mtlynch.io/code-review-love/
1. Review your own code first
2. Write a clear change list description
3. Automate the easy stuff
4. Answer questions with the code itself
5. Narrowly scope changes
6. Separate functional and non-functional changes
7. Break up large change lists
8. Respond graciously to critiques
9. Be patient when your reviewer is wrong
10. Communicate your responses explicitly
11. Artfully solicit missing information
12. Award all ties to your reviewer
13. Minimize lag between rounds of review
https://mtlynch.io/code-review-love/
mtlynch.io
How to Make Your Code Reviewer Fall in Love with You
Best practices for code review when you're the author.
Forwarded from 🇺🇦 Go for two :)
A_cheeky_way_to_check_if_an_expression_is_not_one_of_two_constants.png
110.5 KB
>>> a = 2
>>> a != 2 != 3
False
>>> a != 2 != 3
False