Planet Python

Last update: December 30, 2024 04:42 PM UTC

December 30, 2024

Zero to Mastery

Python Monthly Newsletter 💻🐍

61st issue of Andrei Neagoie's must-read monthly Python Newsletter: Octoverse Results Reveal, GPU Computing, and much more. Read the full newsletter to get up-to-date with everything you need to know from last month.

December 30, 2024 04:42 PM UTC

December 28, 2024

TestDriven.io

Deploying a Django App to AWS ECS with AWS Copilot

This tutorial looks at how to deploy a Django app to AWS ECS with AWS Copilot.

December 28, 2024 10:28 PM UTC

Spyder IDE

Spyder 6 project lead: Remote development interface and application UI/UX improvements

Spyder's lead maintainer, Carlos Cordoba, shares his insights on the projects and features he helped develop for Spyder 6.0, particularly UI/UX and where the IDE is headed next.

December 28, 2024 12:00 AM UTC

December 27, 2024

Daniel Roy Greenfeld

TIL: SequentialTaskSet for Locust

SequentialTaskSet makes it so Locust tasks happen in a particular order, which ensures your simulated users are clicking around in a more human manner at a more human pace. Attribution goes to Audrey Roy Greenfeld.

You can see it in action in the now updated previous entry on the topic of Locust for load testing.

December 27, 2024 11:06 PM UTC

TIL: Making pytest use Ipython's PDB

alias pdb='pytest --pdb --pdbcls=IPython.terminal.debugger:TerminalPdb'

Usage:

pdb tests/test_things::test_broken_thing

December 27, 2024 11:06 PM UTC

TIL: Fractional Indexing

In the past when I've done this for web pages and various other interfaces it has been a mess. I've built ungainly sort order in numeric or alphanumeric batches. Inevitably there is a conflict, often sooner rather than later. So sorting a list of things often means updating all the elements to preserve the order in the datastore. I've learned to mark each element with a big value, but it's ugly and ungainly

Fortunately for me, going forward, I now know about Fractional Indexing.

References:

• https://www.figma.com/blog/realtime-editing-of-ordered-sequences/
• https://observablehq.com/@dgreensp/implementing-fractional-indexing
• https://github.com/httpie/fractional-indexing-python

December 27, 2024 11:06 PM UTC

TIL: Python Dictonary Merge Operator

The function way

Until today I did this:

# Make first dict
num_map = {
    'one': '1', 'two': '2', 'three': '3', 'four': '4',
    'five': '5', 'six': '6', 'seven': '7', 'eight': '8',
    'nine': '9'
}
# Add second dict
num_map.update({str(x):str(x) for x in range(1,10)})
print(num_map)

The operator way

Now thanks to Audrey Roy Greenfeld now I know I can do this:

# Make first dict while adding second dict
num_map = {
    'one': '1', 'two': '2', 'three': '3', 'four': '4',
    'five': '5', 'six': '6', 'seven': '7', 'eight': '8',
    'nine': '9'
} | {str(x):str(x) for x in range(1,10)}
print(num_map)

December 27, 2024 11:06 PM UTC

TIL: Python's defaultdict takes a factory function

I've never really paid attention to this object but maybe I should have. It takes a single argument of a callable function. If you put in Python types it sets the default value to those types. For example, if I use an int at the instantiating argument then it gives us a zero.

>>> from collections import defaultdict
>>>
>>> mydict = defaultdict(int)
>>> print(mydict['anykey'])
0

Note that defaultdict also act like regular dictionaries, in that you can set keys. So mydict['me'] = 'danny' will work as you expect it to with a standard dictionary.

It gets more interesting if we pass in a more dynamic function. In the exmaple below we use random.randint and a lambda to make the default value be a random number between 1 and 100.

>>> from random import randint
>>>
>>> random_values = defaultdict(lambda: randint(1,100))

Let's try it out!

>>> for i in range(5):
>>>     print(random_values[i])
>>> print(random_values)
29
90
56
42
70
defaultdict(<function <lambda> at 0x72d292bb6de0>, {0: 29, 1: 90, 2: 56, 3: 42, 4: 70})

Attribution goes to Laksman Prasad, who pointing this out and encouraging me to closer look at defaultdict.

December 27, 2024 11:06 PM UTC

TIL: How to reset Jupyter notebook passwords

jupyter notebook password

Attribution for this goes to Johno Whitaker.

December 27, 2024 11:06 PM UTC

TIL: Arity

I'm excited to have learned there's a word for the count of arguments to a function/method/class: arity. Throughout my career I would have called this any of the following:

• number_of_args
• param_count
• numargs
• intArgumentCount

Thanks to Simon Willison for using it in a library or two and making me look up the word.

December 27, 2024 11:06 PM UTC

TIL: Using hx-swap-oob with FastHTML

Until now I didn't use this HTMX technique, but today Audrey Roy Greenfeld and I dove in together to figure it out. Note that we use language that may not match HTMX's description, sometimes it's better to put things into our own words so we understand it better.

from fasthtml.common import *

app,rt = fast_app()

def mk_row(name, email):
    return Tbody(
        # Only the Tr element and its children is being
        # injected, the Tbody isn't being injected
        Tr(Td(name), Td(email)),
        # This tells HTMX to inject this row at the end of
        # the #contacts-tbody DOM element
        hx_swap_oob="beforeend:#contacts-tbody",
    ),

@rt
def index():
    return Div(
            H2("Contacts"),
            Table(
                Thead(Tr(Th("Name"), Th("Email"))),
                Tbody(
                    Tr(Td("Audrey"), Td("mommy@example.com")),
                    Tr(Td("Uma"), Td("kid@example.com")),
                    Tr(Td("Daniel"), Td("daddy@example.com")),
                    # Identifies the contacts-tbody DOM element
                    id="contacts-tbody",
                ), 
            ),
            H2("Add a Contact"),
            Form(
                Label("Name", Input(name="name", type="text")),
                Label("Email", Input(name="email", type="email")),
                Button("Save"),
                hx_post="/contacts",
                # Don't swap out the contact form
                hx_swap='none',
                # Reset the form and put focus onto the name field
                hx_on__after_request="this.reset();this.name.focus();"
            )
        )

@rt
def contacts(name:str,email:str):
    print(f"Adding {name} and {email} to table")
    return mk_row(name,email)

serve()

To verify the behavior, view the rendered elements in your browser of choice before, after, and during submitting the form.

December 27, 2024 11:06 PM UTC

TIL: yield from

A variant of the yield statement that can result in more concise code.

December 27, 2024 11:06 PM UTC

TIL: types.SimpleNamespace is a Bunch class

Did you know that Python's types library has a bunch class implementation? How did I not see this before?!

December 27, 2024 11:06 PM UTC

TIL: Autoreload for Jupyter notebooks

Add these commands to the top of a notebook within a Python cell. Thanks to Jeremy Howard for the tip.

%load_ext autoreload
%autoreload 2

December 27, 2024 11:06 PM UTC

TIL: run vs source

Run

A run launches a child process in a new bash within bash, so variables last only the lifetime of the command. This is why launching Python environments doesn't use run.

./list-things.sh

Source

A source is the current bash, so variables last beyond the running of a script. This is why launching Python environments use source.

source ~/.venv/bin/activate

December 27, 2024 11:06 PM UTC

Kushal Das

pastewindow.nvim my first neovim plugin

pastewindow is a neovim plugin written in Lua to help to paste text from a buffer to a different window in Neovim. This is my first attempt of writing a plugin.

We can select a window (in the GIF below I am using a bash terminal as target) and send any text to that window. This will be helpful in my teaching sessions. Specially modifying larger Python functions etc.

I am yet to go through all the Advent of Neovim videos from TJ DeVries. I am hoping to improve (and more features) to the plugin after I learn about plugin development from the videos.

December 27, 2024 08:19 AM UTC

Talk Python to Me

#491: DuckDB and Python: Ducks and Snakes living together

Join me for an insightful conversation with Alex Monahan, who works on documentation, tutorials, and training at DuckDB Labs. We explore why DuckDB is gaining momentum among Python and data enthusiasts, from its in-process database design to its blazingly fast, columnar architecture. We also dive into indexing strategies, concurrency considerations, and the fascinating way MotherDuck (the cloud companion to DuckDB) handles large-scale data seamlessly. Don’t miss this chance to learn how a single pip install could totally transform your Python data workflow!<br/> <br/> <strong>Episode sponsors</strong><br/> <br/> <a href='https://talkpython.fm/sentry'>Sentry Error Monitoring, Code TALKPYTHON</a><br> <a href='https://talkpython.fm/citizens'>Data Citizens Podcast</a><br> <a href='https://talkpython.fm/training'>Talk Python Courses</a><br/> <br/> <h2>Links from the show</h2> <div><strong>Alex on Mastodon</strong>: <a href="https://data-folks.masto.host/@__Alex__?featured_on=talkpython" target="_blank" >@__Alex__</a><br/> <br/> <strong>DuckDB</strong>: <a href="https://duckdb.org/?featured_on=talkpython" target="_blank" >duckdb.org</a><br/> <strong>MotherDuck</strong>: <a href="https://motherduck.com/?featured_on=talkpython" target="_blank" >motherduck.com</a><br/> <strong>SQLite</strong>: <a href="https://sqlite.org/?featured_on=talkpython" target="_blank" >sqlite.org</a><br/> <strong>Moka-Py</strong>: <a href="https://github.com/deliro/moka-py?featured_on=talkpython" target="_blank" >github.com</a><br/> <strong>PostgreSQL</strong>: <a href="https://www.postgresql.org/?featured_on=talkpython" target="_blank" >www.postgresql.org</a><br/> <strong>MySQL</strong>: <a href="https://www.mysql.com/?featured_on=talkpython" target="_blank" >www.mysql.com</a><br/> <strong>Redis</strong>: <a href="https://redis.io/?featured_on=talkpython" target="_blank" >redis.io</a><br/> <strong>Apache Parquet</strong>: <a href="https://parquet.apache.org/?featured_on=talkpython" target="_blank" >parquet.apache.org</a><br/> <strong>Apache Arrow</strong>: <a href="https://arrow.apache.org/?featured_on=talkpython" target="_blank" >arrow.apache.org</a><br/> <strong>Pandas</strong>: <a href="https://pandas.pydata.org/?featured_on=talkpython" target="_blank" >pandas.pydata.org</a><br/> <strong>Polars</strong>: <a href="https://pola.rs/?featured_on=talkpython" target="_blank" >pola.rs</a><br/> <strong>Pyodide</strong>: <a href="https://pyodide.org/?featured_on=talkpython" target="_blank" >pyodide.org</a><br/> <strong>DB-API (PEP 249)</strong>: <a href="https://peps.python.org/pep-0249/?featured_on=talkpython" target="_blank" >peps.python.org/pep-0249</a><br/> <strong>Flask</strong>: <a href="https://flask.palletsprojects.com/?featured_on=talkpython" target="_blank" >flask.palletsprojects.com</a><br/> <strong>Gunicorn</strong>: <a href="https://gunicorn.org/?featured_on=talkpython" target="_blank" >gunicorn.org</a><br/> <strong>MinIO</strong>: <a href="https://min.io/?featured_on=talkpython" target="_blank" >min.io</a><br/> <strong>Amazon S3</strong>: <a href="https://aws.amazon.com/s3/?featured_on=talkpython" target="_blank" >aws.amazon.com/s3</a><br/> <strong>Azure Blob Storage</strong>: <a href="https://azure.microsoft.com/products/storage/?featured_on=talkpython" target="_blank" >azure.microsoft.com/products/storage</a><br/> <strong>Google Cloud Storage</strong>: <a href="https://cloud.google.com/storage?featured_on=talkpython" target="_blank" >cloud.google.com/storage</a><br/> <strong>DigitalOcean</strong>: <a href="https://www.digitalocean.com/?featured_on=talkpython" target="_blank" >www.digitalocean.com</a><br/> <strong>Linode</strong>: <a href="https://www.linode.com/?featured_on=talkpython" target="_blank" >www.linode.com</a><br/> <strong>Hetzner</strong>: <a href="https://www.hetzner.com/?featured_on=talkpython" target="_blank" >www.hetzner.com</a><br/> <strong>BigQuery</strong>: <a href="https://cloud.google.com/bigquery?featured_on=talkpython" target="_blank" >cloud.google.com/bigquery</a><br/> <strong>DBT (Data Build Tool)</strong>: <a href="https://docs.getdbt.com/?featured_on=talkpython" target="_blank" >docs.getdbt.com</a><br/> <strong>Mode</strong>: <a href="https://mode.com/?featured_on=talkpython" target="_blank" >mode.com</a><br/> <strong>Hex</strong>: <a href="https://hex.tech/?featured_on=talkpython" target="_blank" >hex.tech</a><br/> <strong>Python</strong>: <a href="https://www.python.org/?featured_on=talkpython" target="_blank" >www.python.org</a><br/> <strong>Node.js</strong>: <a href="https://nodejs.org/?featured_on=talkpython" target="_blank" >nodejs.org</a><br/> <strong>Rust</strong>: <a href="https://www.rust-lang.org/?featured_on=talkpython" target="_blank" >www.rust-lang.org</a><br/> <strong>Go</strong>: <a href="https://go.dev/?featured_on=talkpython" target="_blank" >go.dev</a><br/> <strong>.NET</strong>: <a href="https://dotnet.microsoft.com/?featured_on=talkpython" target="_blank" >dotnet.microsoft.com</a><br/> <strong>Watch this episode on YouTube</strong>: <a href="https://www.youtube.com/watch?v=3wGeadcKens" target="_blank" >youtube.com</a><br/> <strong>Episode transcripts</strong>: <a href="https://talkpython.fm/episodes/transcript/491/duckdb-and-python-ducks-and-snakes-living-together" target="_blank" >talkpython.fm</a><br/> <br/> <strong>--- Stay in touch with us ---</strong><br/> <strong>Subscribe to Talk Python on YouTube</strong>: <a href="https://talkpython.fm/youtube" target="_blank" >youtube.com</a><br/> <strong>Talk Python on Bluesky</strong>: <a href="https://bsky.app/profile/talkpython.fm" target="_blank" >@talkpython.fm at bsky.app</a><br/> <strong>Talk Python on Mastodon</strong>: <a href="https://fosstodon.org/web/@talkpython" target="_blank" ><i class="fa-brands fa-mastodon"></i>talkpython</a><br/> <strong>Michael on Bluesky</strong>: <a href="https://bsky.app/profile/mkennedy.codes?featured_on=talkpython" target="_blank" >@mkennedy.codes at bsky.app</a><br/> <strong>Michael on Mastodon</strong>: <a href="https://fosstodon.org/web/@mkennedy" target="_blank" ><i class="fa-brands fa-mastodon"></i>mkennedy</a><br/></div>

December 27, 2024 08:00 AM UTC

Matt Layman

Optimizing SQLite - Building SaaS #210

In this episode, when worked on the newly migrated JourneyInbox site and focused on the database. Since me moved from Postgres to SQLite, I needed to make sure that SQLite was ready for users. We examined common configuration to optimize the database and applied that config to JourneyInbox.

December 27, 2024 12:00 AM UTC

December 26, 2024

Armin Ronacher

Reflecting on Life

Last year I decided that I want to share my most important learnings about engineering, teams and quite frankly personal mental health. My hope is that those who want to learn from me find it useful. This is a continuation to this.

Over the years, I've been asked countless times: “What advice would you give to young programmers or engineers?” For the longest time, I struggled to answer. I wasn't sure I had anything definitive or profound to offer. And truthfully, even now, I'm not convinced I have enough answers. But as I've reflected on my journey to here, I've formulated some ideas that I believe are worth sharing — if only to provide a bit of guidance to those just starting out. For better or worse, I think those things are applicable regardless of profession.

My core belief is that fulfillment and happiness comes from deliberate commitment to meaningful work, relationships, and personal growth and purpose. I don't claim that these things can be replicated, but they worked for me and some others, so maybe they can be of use for you.

December 26, 2024 12:00 AM UTC

December 25, 2024

Daniel Roy Greenfeld

Using locust for load testing

Locust is a Python library that makes it relatively straightforward to write Python tests. This heavily commented code example explains each section of code. To use locust:

1. Install locust: pip install locust
2. Copy the file below into the directory where you want to run locust
3. In that directory, at the command-line, type: locust
4. Open http://localhost:8089/

# locustfile.py
# For more options read the following
#   - https://docs.locust.io/en/stable/writing-a-locustfile.html
#   - https://docs.locust.io/en/stable/tasksets.html

# Import Locust basics
from locust import HttpUser, SequentialTaskSet, task, between

# Imports for generating content
from string import ascii_letters
from random import randint, shuffle

def namer():
    "Create a random string of letters under 10 characters long"
    ascii_list = list(ascii_letters)
    shuffle(ascii_list)
    return ''.join(ascii_list[:10])

class TaskSet(SequentialTaskSet):
    """
    A class for organizing tasks, inheriting from
    SequentialTaskSet means the tasks happen in order.
    """

    def on_start(self):
        # Methods with the on_start name will be called for each
        # simulated user when they start. Useful for logins and
        # other 'do before doing all other things'.
        pass

    def on_stop(self):
        # Methods with the on_stop name will be called for each
        # simulated user when they stop. Useful for logouts and
        # possibly data cleanup.
        pass    

    # TASKS!
    # Methods marked with the `@task` decorator is an action
    # taken by a user This example focuses on changes to a 
    # database, but provides a foundation for creating tests on
    # a more read-focused site

    @task
    def index(self):
        # User goes to the root of the project
        self.client.get('/')

    @task
    def create(self):
        # User posts a create form with the fields 'name'
        # and 'age'
        with self.client.post('/create', dict(name=namer(), age=randint(1,35))) as resp:
            self.pk =  resp.text

    @task
    def update(self):
        # User posts an update form with the fields 'name'
        # and 'age'"
        form_data = dict(id=self.pk, name=namer(), age=randint(1,35))
        self.client.post(f'/{self.pk}/update', form_data)

    @task
    def delete(self):
        # Represents the user getting a random ID and then
        # going to the delete page for it.
        self.client.get(f'/{self.pk}/delete')

class CatsiteUser(HttpUser):
    """
    This class represents simulated users interacting with
    a website.
    """
    # What tasks should be done    
    tasks = [TaskSet]
    # how long between clicks a user should take
    wait_time = between(2, 5)
    # The default host of the target client. This can be changed
    # at any time
    host = 'http://localhost:5001/'    

Sample test site

For reference, this is the test site used to create the above locustfile. I'll admit that the above test is incomplete, a lot more tasks could be added to hit web routes. To use it:

1. Install FastHTML: pip install python-fasthtml
2. Copy the file into the directory you want to run it
3. In that directory, at the command-line, type: python cats.py
4. Open http://localhost:5001/

# cats.py
from fasthtml.common import *

# Set up the database and table
db = database('cats.db')
class Cat: name:str; age:int; id:int
cats = db.create(Cat, pk='id', transform=True)

# Instantiate FastHTML app and route handler
app, rt = fast_app()

def mk_form(target: str):
    return Form(
            P(A('Home', href=index)),
            Fieldset(
                Input(name='name'),
                Input(name='age', type='number'),

            ),
            Input(type='submit', value='submit'),
            method='post'
        )

def cat_count():
    query = """select count(id) from cat;"""
    result = db.execute(query)
    return result.fetchone()[0]

@rt
def index():
    return Titled('Cats',
        P(A('Create cat', href='/create'), NotStr(' '), A('Random ID', href=random)),
        P(f'Number of cats: {cat_count()}'),        
        Ol(
            *[Li(A(f'{d.name}:{d.age}', href=f'/{d.id}')) for d in cats()]
        )
    )

@rt
def random():
    # Small datasets so we can get away with using the RANDOM() function here
    query = """SELECT id FROM cat ORDER BY RANDOM() LIMIT 1;"""
    result = db.execute(query)
    return result.fetchone()[0]

@rt('/create')
def get():
    return Titled('Create Cat', 
        mk_form('/create')
    )

@rt('/create')
def post(cat: Cat):
    while True:
        try:
            cat = cats.insert(Cat(name=cat.name, age=cat.age))
            break
        except Exception as e:
            print(e)
            raise
    return cat.id

@rt('/{id}')
def cat(id: int):
    cat = cats[id]
    return Titled(cat.name, 
        P(cat.age),
        P(A('update', href=f'/{id}/update')),
        P(A('delete', href=f'/{id}/delete')),
    )


@rt('/{id}/update')
def get(id: int):
    cat = cats[id]
    return Titled('Edit Cat',
        fill_form(mk_form(f'/{cat.id}/update'), cat)
    )

@rt('/{id}/update')
def post(cat: Cat, id: int):
    if id not in cats:
        return RedirectResponse(url=index)
    cat.id = id
    db.begin()
    try:
        cats.update(cat)
        db.commit()        
    except:
        db.rollback()
    return RedirectResponse(url=f'/{cat.id}')

@rt('/{id}/delete')
def cat(id: int):
    if id not in cats:
        RedirectResponse(url=index)
    # db.begin()
    cats.delete(id)
    # db.commit()
    return RedirectResponse(url=index)

serve()

Updates

• 2024-11-08 Use SequentialTaskSet as recommended by Audrey Roy Greenfeld
• 2024-11-08 Fixed a few bugs in cats.py

December 25, 2024 03:14 AM UTC

December 24, 2024

PyCoder’s Weekly

Issue #661 (Dec. 24, 2024)

#661 – DECEMBER 24, 2024
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Articles & Tutorials

Projects & Code

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Happy Pythoning!
This was PyCoder’s Weekly Issue #661.
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December 24, 2024 07:30 PM UTC

Django Weblog

Welcome to our new Django accessibility team members - Eli, Marijke, Saptak, Tushar

Sarah Abderemane, Thibaud Colas and Tom Carrick are pleased to introduce four new members in the Django Accessibility team ❤️.

Marijke Luttekes

Eliana Rosselli

Tushar Gupta

Saptak Sengupta

Marijke (pronounced Mah-Rye-Kuh) is a freelance web developer who creates human-friendly applications. She is based in Groningen, The Netherlands, specializing in Django, Python, HTML, SCSS, and vanilla JavaScript. She helps companies expand their existing projects, think about new features, train new developers, and improve developer team workflows. She is aDdjango contributor from the first session of Djangonaut Space program and she loves tea. You can learn more about Marijke on her website.

Eli is a full-stack developer from Uruguay who loves using Django and React. She is a Django contributor from the first session of the Djangonaut Space program

Tushar is a software engineer at Canonical, based in India. He got involved on open source during his studies loving the the supportive community. Through fellowships like Major League Hacking, Tushar dove into Django and took part in Djangonaut Space. Learn more about Tushar on his personal website.

Saptak is a self-proclaimed Human Rights Centered Developer Web. He focuses on security, privacy, accessibility, localization, and other human rights associated with websites that makes websites more inclusive and usable by everyone. Learn more about Saptak on his personal website.

Listen to them talking about their work¶

Here are recent talks or podcasts from our new team members if you want to get to know them better.

Marijke Luttekes - My path to becoming a Django contributor | pyGrunn 2024 Eli Rosselli - My step-by-step guide to becoming a Django core contributor | DjangoCon Europe 2024 Tushar Gupta - Djangonauts, Ready for Blast-Off | Talk Python to Me Ep.451 Saptak S - Accessibility for the Django Community | DjangoCon Europe 2024

What’s next¶

In truth, our four new accessibility team members joined the team months ago – shortly after we published our 2023 accessibility team report. Up next, a lot of the team will be present at FOSDEM 2025, organizing, volunteering, or speaking at the Inclusive Web Devroom.

December 24, 2024 02:00 PM UTC

Talk Python to Me

#490: Django Ninja

If you're a Django developer, I'm sure you've heard so many people raving about FastAPI and Pydantic. But you really love Django and don't want to switch. Then you might want to give Django Ninja a serious look. Django Ninja is highly inspired by FastAPI, but is also deeply integrated into Django itself. We have Vitaliy Kucheryaviy the creator of Django Ninja on this show to tell us all about it.<br/> <br/> <strong>Episode sponsors</strong><br/> <br/> <a href='https://talkpython.fm/sentry'>Sentry Error Monitoring, Code TALKPYTHON</a><br> <a href='https://talkpython.fm/bluehost'>Bluehost</a><br> <a href='https://talkpython.fm/training'>Talk Python Courses</a><br/> <br/> <h2>Links from the show</h2> <div><strong>Vitaly</strong>: <a href="https://github.com/vitalik?featured_on=talkpython" target="_blank" >github.com/vitalik</a><br/> <strong>Vitaly on X</strong>: <a href="https://x.com/vital1k?featured_on=talkpython" target="_blank" >@vital1k</a><br/> <br/> <strong>Top 5 Episodes of 2024</strong>: <a href="https://talkpython.fm/blog/posts/top-talk-python-podcast-episodes-of-2024/" target="_blank" >talkpython.fm/blog/posts/top-talk-python-podcast-episodes-of-2024</a><br/> <br/> <strong>Django Ninja</strong>: <a href="https://django-ninja.dev/?featured_on=talkpython" target="_blank" >django-ninja.dev</a><br/> <strong>Motivation section we talked through</strong>: <a href="https://django-ninja.dev/motivation/?featured_on=talkpython" target="_blank" >django-ninja.dev/motivation</a><br/> <strong>LLM for Django Ninja</strong>: <a href="https://llm.django-ninja.dev/?featured_on=talkpython" target="_blank" >llm.django-ninja.dev</a><br/> <strong>Nano Django</strong>: <a href="https://github.com/vitalik/nano-django?featured_on=talkpython" target="_blank" >github.com/vitalik/nano-django</a><br/> <strong>Episode transcripts</strong>: <a href="https://talkpython.fm/episodes/transcript/490/django-ninja" target="_blank" >talkpython.fm</a><br/> <br/> <strong>--- Stay in touch with us ---</strong><br/> <strong>Subscribe to Talk Python on YouTube</strong>: <a href="https://talkpython.fm/youtube" target="_blank" >youtube.com</a><br/> <strong>Talk Python on Bluesky</strong>: <a href="https://bsky.app/profile/talkpython.fm" target="_blank" >@talkpython.fm at bsky.app</a><br/> <strong>Talk Python on Mastodon</strong>: <a href="https://fosstodon.org/web/@talkpython" target="_blank" ><i class="fa-brands fa-mastodon"></i>talkpython</a><br/> <strong>Michael on Bluesky</strong>: <a href="https://bsky.app/profile/mkennedy.codes?featured_on=talkpython" target="_blank" >@mkennedy.codes at bsky.app</a><br/> <strong>Michael on Mastodon</strong>: <a href="https://fosstodon.org/web/@mkennedy" target="_blank" ><i class="fa-brands fa-mastodon"></i>mkennedy</a><br/></div>

December 24, 2024 08:00 AM UTC

December 23, 2024

Daniel Roy Greenfeld

TIL: Using Python to removing prefixes and suffixes

Starting in Python 3.9, s.removeprefix() and s.removesuffix() were added as str built-ins. Which easily covers all the versions of Python I currently support.

Usage for removeprefix():

>>> 'Spam, Spam'.removeprefix('Spam')
', Spam'
>>> 'Spam, Spam'.removeprefix('This is not in the prefix')
'Spam, Spam'

Usage for removesuffix():

>>> 'Spam, Spam'.removesuffix('Spam')
'Spam, '
>>> 'Spam, Spam'.removesuffix('This is not in the suffix')
'Spam, Spam'

December 23, 2024 07:03 PM UTC

Juri Pakaste

New Swift Package: tui-fuzzy-finder

Speaking of new Swift libraries, I released another one: tui-fuzzy-finder is a terminal UI library for Swift that provides an incremental search and selection UI that imitates the core functionality of fzf very closely.

I have a ton of scripts that wrap fzf. Some of them try to provide some kind of command line interface with options. Most of them work with pipes where I fetch data from somewhere, parse it with jq, feed it fzf, use the selection again as a part of a parameter for something else, etc. It's all great, except that I really don't love shell scripting.

With tui-fuzzy-finder I want to be able to write tools like that in a language I do actually enjoy a great deal. The package provides both a command line tool and a library, but the purpose of the command line tool is just to allow me to test the library, as writing automatic tests for terminal control is difficult. Competing with fzf in the general purpose CLI tool space is a non-goal.

I haven't implemented the preview features of fzf, nor key binding configuration. I'm not ruling either of those out, but I have not needed them yet and don't plan to work on them before a need arises.

Documentation at Swift Package Index.

December 23, 2024 03:25 PM UTC

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