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Welcome to c/Python, the go to place to discuss Python tools, techniques, and news.

We're just getting started, so please use this thread to suggest what this community should look like, what it should cover, and how it should operate.

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I've been writing code professionally for 24 years, 15 of which has been Python and 9 years of that with Docker. I got tired of running into the same complications every time I started a new job, so I wrote this. Maybe you'll find it useful, or it could even start a conversation, but this post has been a long time coming.

Update: I had a few requests for a demo repo as a companion to this post, so I wrote one today. It includes a very small Django demo user Docker, Compose, and GitLab CI.

A library for creating fully typed and declarative API clients, quickly and easily.

What would an API client with this library look like?

For a single API endpoint over HTTP GET, it could look something like this:

``` from dataclasses import dataclass import quickapi

An example type that will be part of the API response

@dataclass class Fact: fact: str length: int

What the API response should look like

@dataclass class ResponseBody: current_page: int data: list[Fact]

Now we can define our API

class MyApi(quickapi.BaseApi[ResponseBody]): url = "https://catfact.ninja/facts" response_body = ResponseBody ```

And you would use it like this:

``` response = MyApi().execute()

That's it! Now response is fully typed (including IDE support) and conforms to our ResponseBody definition

assert isinstance(response.body, ResponseBody) assert isinstance(response.body.data[0], Fact) ```

It also supports attrs or pydantic (or dataclasses as above) for your model/type definitions, including validation and types/data conversion.

I have a lot more examples (e.g. POST requests, query string params, authentication, error handling, model validation and conversion, multiple API endpoints) on the repo's README.

I've shared this one here before but it's been a while and I've added a lot of features since.

Github repo: https://github.com/martinn/quickapiclient

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New to CircuitPython, this feels like it should work according to the docs but it prints six Falses. Any ideas?

``` #!/usr/bin/env python import board import digitalio import time

class body_controller:

def init(self): SWDIO = board.D5 self._reset_pin = digitalio.DigitalInOut(SWDIO) print(self._reset_pin.value) self._reset_pin.switch_to_output(True) print(self._reset_pin.value)

def turn_on(self): print(self._reset_pin.value) self._reset_pin.value = False print(self._reset_pin.value) time.sleep(1) print(self._reset_pin.value) self._reset_pin.value = True print(self._reset_pin.value)

body = body_controller() time.sleep(1) body.turn_on() time.sleep(1) ```

Ive learned a decent bit of python from a trade school I was in and I am really interested in learning more and eventually do freelance work

And I'm looking for advice on ensuring I know enough to do that as well as some advice getting started

> In this article we will explore some lesser known, but interesting and useful corners of Python standard library.

...

> To provide more powerful containers for storing data in memory Python ships a collection module ...

> Python has with keyword to create context manager that will auto-cleanup things within lexical scope ...

> To address this problem, Python ships decimal module that allows us represent decimal numbers as Python objects with operator overloading ...

> Likewise, we can run into problem when dealing with fractions - one third is not exactly equal to 0.333… Python ships with fractions module to represent them as Python objects with operator overloading ...

> The standard Python installation ships with dis module that takes Python code units (e.g. a function) and disassembles the code into a kind of pseudo-assembler ...

> Python statistics module provides a small toolkit of statistical algorithms for relatively simple applications where it is an overkill to use Pandas or Numpy: standard deviation, several kinds of average of numeric data, linear regression, correlation, normal distribution and others ...

> To make this easier Python ships a webbrowser module with simple API to make a browser show a page ...

> To make this less terrible Python ships zipapp module with CLI tool and Python API to package Python code into single file packages ...

Hi, folks!

I'd like to set up my emacs with lsp-mode and lsp-ui, but I am finding myself in some analysis paralysis. Ruling out the Palantir language server because it's deprecated and because it's Palantir, that still leaves me with five language server recommendations from lsp-mode.

Anybody have any opinions they'd like to share? Any really bad experiences I should avoid? How do I configure your favorite? (Feel free to assume I know very little about configuring emacs.)

If it makes a difference, I am a poetry user and a religious mypy --strict user.

Thanks in advance!

I'm currently doing Dr. Charles Severence's lessons on FreeCodeCamp to try to learn Python3. I'm on lesson exercise 02_03 and confused about multiplying floating-point and integer values.

The goal is to write a Python program multiplying hours worked by pay rate to come up with a pay quantity.

This is the code I wrote:

h = input("Enter hours: ") r = input("Enter pay rate: ") p = float(h) * r

I got a traceback error, and the video said the correct way to solve said error was change Line 3 from p = float(h) * r to p = float(h) * float(r).

However, what I'm confused about is why would I need to change r to a floating-point value when it's already a floating-point value (since it'd be a currency value like 5.00 or something once I typed it in per the input() command*?

What am I missing here?

 

--- *I can't remember: are the individual commands in a python line called "commands"?

 

 

--- Edit: Wrote plus signs in my post here instead of asterisks. Fixed.

 

--- EDIT: Thanks to @Labna@lemmy.world and @woop_woop@lemmy.world. I thought that the input() function was a string until the end-user types something in upon being prompted, and then becomes a floating-point value or integer value (or stays a string) according to what was typed.

This is incorrect: the value is a string regardless of what is typed unless it is then converted to another type.

I read some articles about using a virtual environment in Docker. Their argument are that the purpose of virtualization in Docker is to introduce isolation and limit conflicts with system packages etc.

However, aren't Docker and Python-based images (e.g., python:*) already doing the same thing?

Can someone eli5 this whole thing?

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> For every bytecode compiled language, the most interesting part of its implementation is its virtual machine (also referred to as the bytecode interpreter) where the bytecode execution takes place. Because this is such a crucial part of the language machinery, its implementation has to be highly performant. Even if you are not a compiler engineer, learning about such internal implementation can give you new performance tricks and insights that you may be able to use in other places of your job. And, if you are a compiler engineer then you should always look around how other languages are implemented to pickup implementation details that you may not be aware of.

> In this article, we are going to be discussing the bytecode instruction format of CPython, followed by the implementation of the bytecode evaluation loop of the interpreter where the bytecode execution takes place.

Original comment:

> I don’t know much about voting systems, but I know someone who does. Unfortunately he’s currently banned. Maybe we can wait until his 3-month ban expires and ask him for advice?

Previous discussion

> CircuitPython is an open-source implementation of the Python programming language for microcontroller boards. The project, which is sponsored by Adafruit Industries, is designed with new programmers in mind, but it also has many features that may be of interest to more-experienced developers. The recent 9.1.0 release adds a few minor features, but it follows just a few months after CircuitPython 9.0.0, which brings some more significant changes, including improved graphics and USB support.

> CircuitPython is a fork of MicroPython (previously covered on LWN) with several changes designed to make the language easier for beginners to use. CircuitPython has a universal hardware API and is more compatible with the CPython standard library, for example. CircuitPython has some limitations compared to MicroPython, particularly with respect to concurrency, but is otherwise just as powerful.

...

> This difference in APIs make sense when looking at the main goals of each project. MicroPython describes the language as ""a lean and efficient implementation of the Python 3 programming language that includes a small subset of the Python standard library and is optimised to run on microcontrollers and in constrained environments"". In contrast, Adafruit's "What is CircuitPython?" page says: ""CircuitPython is a programming language designed to simplify experimenting and learning to program on low-cost microcontroller boards."" Adafruit recommends CircuitPython for users who ""want to get up and running quickly"" or ""are new to programming"".

> CircuitPython supports most of the core language features of CPython, although some features are missing due to the limited resources found on microcontroller boards compared to the much more powerful computers on which CPython typically runs. Many of those missing features will be the same as those on a comparison between CPython and MicroPython reports. In addition, as CircuitPython's main README explains: ""Modules with a CPython counterpart, such as time, os and random, are strict subsets of their CPython version. Therefore, code from CircuitPython is runnable on CPython but not necessarily the reverse.""

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TL;DR: uv is an extremely fast Python package manager, written in Rust.

!

!

First thing first, while I started to build this package I've made an error with the word <scraper> that I've misspelled in <scrapper> I'm not a native english speaker. I'm planning to change the name and correct it. So don't be mad with me about it. Ok now let me introduce my first python package.

aba-cli-scrapper** i'ts a cli tool to easily build a dataset from Alibaba.

look at the repo to know more about this project : https://github.com/poneoneo/Alibaba-CLI-Scraper

I'm excited to share the latest release of my first Python package, aba-cli-scrapper designed to facilitate data extraction from Alibaba. This command-line tool enables users to build a comprehensive dataset containing valuable information on products and suppliers associated . The extracted data can be stored in either a MySQL or SQLite database, with the option to convert it into CSV files from the SQLite file.

The latest feature will be an ai agent to chat with about data saved. I'm working on this. Its should be release very a soon.

Key Features:

--Asynchronous mode for faster scraping of page results using Bright-Data API key (configuration required)

--Synchronous mode available for users without an API key (note: proxy limitations may apply)

--Supports data storage in MySQL or SQLite databases

--Text mode for thoses who are not comfortable with cli app

--Converts data to CSV files from SQLite database

Seeking Feedback and Contributions:

I'd love to hear your thoughts on this project and encourage you to test it out. Your feedback and suggestions on the package's usefulness and potential evolution are invaluable. Future plans include adding a RAG feature to enhance database interactions.

Feel free to try out aba-cli-scrapper and share your experiences! Leave a start if you liked .

Read about how Python 3.13 will open door for new ear for python community.

https://medium.com/@darshit7/beyond-the-gil-future-of-parallel-computing-in-python-38ef2a80555c

@python

cross-posted from: https://lemm.ee/post/39533101

> The Python Steering Council has decided to suspend a core Python developer for three months for alleged Code of Conduct violations.

> Citing the recommendation of the Code of Conduct Working Group, Python developer Thomas Wouters revealed on behalf of the Steering Council that the unidentified developer was deemed to have repeatedly violated the Python Software Foundation (PSF) Code of Conduct.

> The suspended developer is Tim Peters, who told The Register it was fine to name him but declined to comment – beyond observing that one of his objections to the governance process is the secrecy involved.

> GIL or Global Interpreter Lock can be disabled in Python version 3.13. This is currently experimental.

> Python 3.13 brings major new features compared to Python 3.12 and one of them is free-threaded mode, which disables the Global Interpreter Lock, allowing threads to run more concurrently.

> The GIL will be disabled when you configure the Python with the --disable-gil option which is nothing but a build configuration (free threading build) at the time of installation.

> This will allow optionally enabling and disabling GIL using the environment variable PYTHON_GIL which can be set to 1 and 0 respectively.

> It will also provide a command-line option -X gil which can also be set to 0 (disable) and 1 (enable).

Hi,

I use gunicorn in my venv

I have quite few venv that run gunicorn.

I would like to reuse gunicorn for other venv

I launch my web application like this

bash #PWD = venv dir source ./bin/activate gunicorn A_WebApp:app #A_WebApp is my python file A_WebApp.py I supposes that gunicorn is a shell program ? if yes I should use $PATH ? \ or gunicorn is a Python program only ? and then what I should do to use gunicorn in another venv ?

Thanks.

Hi All,

I'm screening a large media library (20TB) wherein some files got corrupted when I did a transfer via filezilla (by my guess ~10%). The corrupted files display with a green "filter" over every frame (when played via plex and a number of local video players playing the file directly).

I'd like to screen the library, and want to write a script to get an average color reading.

Are there any libraries that would let me return a value AND specify how many frames I want it to take the average of? Because of how consistent and defined the issue is, it's really not necessary to average the whole file.

It would also be great if it automatically skipped non-video files, but I imagine a simple "try/except" would be fine.

My skill level here is best described as "high level hobbyist". I'm familiar with what I need to do iterating over the folder etc, but would prefer not to learn how to pull specific frames from a video container unless I have to.

Thanks for any help!

cross-posted from: https://lemmy.ml/post/18540661

> Hi, > > I'm looking for a software similar to ZoneMinder \ > https://lemmy.ml/post/18530232 > > But it seem that ZoneMinder become slowly outdated, php etc.. > > I've found a couples of alternatives ( hard choice as the limitations of use are often buried deep ) > > It seem that openCV is really famous for AI Computer vision, So I would be surprise if there were no Python program to manage cameras like a ZoneMinder !? > > Do you know any ? > > Thanks.

cross-posted from: https://mastodon.social/users/Berin/statuses/112836125469155607

> New Ren'Py Lemmy Community! > > Heyo, I made a community for Ren'Py developers to ask for help and share their projects! Feel free to tag it to crosspost your mastodon posts, just like this post here. (But read the rules first, please) > > https://discuss.tchncs.de/c/renpy > > @renpy > > \#RenPy #GameDev #VNDev #IndieDev #VisualNovel

Hello Python community! I wanted to present the newly-made Ren'Py community on here.

Ren'Py is a Python-based game engine for visual novel development aimed at beginner developers with little prior programming experience. It uses a simple movie script-like syntax and provides both must-have visual novel components and tons of quality-of-life features out of the box. Capable Python programmers can easily extend the framework via custom components.

If you ever wanted to create an interactive fiction game, feel free to take a look!

!renpy@discuss.tchncs.de

I wrote a TUI application to help you practice Python regular expressions. There are more than 100 exercises covering both the builtin re and third-party regex module.

If you have pipx, use pipx install regexexercises to install the app. See the repo for source code and other details.