All posts with the tag "python"
When fetching pydantic models from the database with sqlmodel, and you cannot select your item by id, you probably need to use a where clause. This is the sqlmodel way of doing it.
Here is a snippet of how I am using sqlmodel select and where to find a post by link in my thoughts database.
In order to turn url encoded links back into links that I would find in the database of my thoughts project I need to urldecode them when they hit the api. When anything hits the api it must urlencode the links in order for them to be sent correctly as data and not get parsed as part of the url.
Here is a snippet of how I am using urlib.parse.unquote to un-encode encoded urls so that I can fetch posts from the database.
Prime reviews an article with some hot takes about python being slow and quirky, but good enough for a lot of things. Especially data applications that have libraries written in C.
The next version of markata will be around a full second faster at building it’s docs, that’s a 30% bump in performance at the current state. This performance will come when virtual environments are stored in the same directory as the source code.
I was looking through my profiler for some unexpected performance hits, and noticed that the docs plugin was taking nearly a full second (sometimes more), just to run glob.
| |- 1.068 glob markata/plugins/docs.py:40 | | |- 0.838 <listcomp> markata/plugins/docs.py:82 | | | `- 0.817 PathSpec.match_file pathspec/pathspec.py:165 | | | [14 frames hidden] pathspec, <built-in>, <string>
I started looking for different solutions and what I found was that I was hitting pathspec with way more files than I needed to.
len(list(Path().glob("**/*.py"))) # 6444 len([Path(f) for f in glob.glob("**/*.py", recursive=True)]) # 110
After digging into the docs I found that...
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I don’t want to be an expert python developer.
https://www.youtube.com/watch?v=iKzOBWOHGFE
# Version 1 def newton(f, x0, fprime, maxiter=100): ... # Version 2 def newton(f, x0, fprime, tol=1e-6, maxiter=100): ... # 🔴 Broke in Version 2 newton(f, x0, fprime, 100)
In an alternate timeline the maintainer of newton could have chose to use keyword only arguments to prevent pain for users of libraries, or poor api design due to fear of changing api on users.
global Field global BaseModel from pydantic import BaseModel from pydantic import Field
Pydantic is a Python library for serializing data into models that can be validated with a deep set of built in valitators or your own custom validators, and deserialize back to JSON or dictionary.
To install pydantic you will first need python and pip. Once you have pip installed you can install pydantic with pip.
pip install pydantic
Always install in a virtual environment
To get started with pydantic you will first need to create a Pydantic model. This is a python class that inherits from
pydantic.BaseModel....
The following is a playthrough of Star Wars Text Adventure with a 10 yr old.The following is a playthrough of StarThe following is a playthrough of Star
I was reading about pydantic-singledispatch from Giddeon’s blog and found it very intersting. I’m getting ready to implement pydantic on my static site generator markata, and I think there are so uses for this idea, so I want to try it out.
Let’s set up some pydantic settings. We will need separate Models for each environment that we want to support for this to work. The whole idea is to use functools.singledispatch and type hints to provide unique execution for each environment. We might want something like a path_prefix in prod for environments like GithubPages that deploy to /<name-of-repo> while keeping the root at / in dev.
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I really like having global cli command installed with pipx. Since textual 0.2.x (the css release) is out I want to be able to pop into textual devtools easily from anywhere.
You can pipx install textual.
pipx install textual
But if you try to run any textual cli commands you will run into a ModuleNotFoundError, because you need to install the optional dev dependencies.
Traceback (most recent call last): File "/home/u_walkews/.local/bin/textual", line 5, in <module> from textual.cli.cli import run File "/home/u_walkews/.local/pipx/venvs/textual/lib/python3.10/site-packages/textual/cli/cli.py", line 4, in <module> import click ModuleNotFoundError: No module named 'click'
In order to install optional dependencies with pipx you need to first install the library, then inject in the optional dependencies using the square bracket syntax.
I am working through the textual tutorial, and I want to put it in a proper cli that I can pip install and run the command without textual run --dev app.py. This is a fine pattern, but I also want this to work when I don’t have a file to run.
I set up a new project running hatch new, and added the following entrypoint, giving me a tutorial cli command to run.
... [project.scripts] tutorial = 'textual_tutorial.tui:tui'
https://waylonwalker.com/hatch-new-cli/
If you are using setup.py, you can set up entrypoints in the setup command.
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Markata now allows you to create jinja extensions that will be loaded right in with nothing more than a pip install.
The entry for 0.5.0.dev2 from markata’s changelog
In my adventure to learn django, I want to be able to setup REST api’s to feed into dynamic front end sites. Potentially sites running react under the hood. To get started lets open up a Now we need to declare Next I will create all the files that I need to get the api running. ... Markata now uses hatch as its build backend, and version bumping tool. Markata 0.5.0 is now out, and it’s huge. Even though it’s the backend of this blog I don’t actually have that many posts directly about it. I’ve used it a bit for blog fuel in generic ways, like talking about pluggy and diskcache, but very little have I... ... My next step into django made me realize that I do not have access to the admin panel, turns out that I need to create a cuper user first. Right away when trying to setup the superuser I ran into this issue Back to the tutorial tells me that I need to run migrations to setup some tables for the yes I am still running remote on from my chromebook. ... I am continuing my journey into django, but today I am not at my workstation. I am ssh’d in remotely from a chromebook. I am fully outside of my network, so I can’t access it by localhost, or it’s ip. I do have cloudflared tunnel installed and dns setup to a I found this in I have no experience in django, and in my exploration to become a better python developer I am dipping my toe into one of the most polished and widely used web frameworks Django to so that I can better understand it and become a better python developer. If you found this at all helpful make sure you check out the django tutorial The first thing I need to do is render out a template to start the project. For this I need the ...
npx create-react-app todoreact import React,{useState,useEffect} from 'react'; import './App.css'; function App() { const [data,setData]=useState([]); const [newName,setNewName]=useState([]); const getData=()=>{ fetch('/api' ,{ headers : { 'Content-Type': 'application/json', 'Accept': 'application/json' } } ) .then(function(response){ return response.json(); }) .then(function(myJson) { setData(myJson) }); } useEffect(()=>{ getData() },[]) const addItem= async () => { const rawResponse = await fetch('/api/add/', { method: 'POST', headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' }, body: JSON.stringify({"name": newName}) }); const content = await rawResponse; console.log(content); getData() } return ( <div className="App"> { data && data.length>0 && data.map((item)=><p>{item.id}{item.priority}{item.name}<button>raise priority</button></p>) } <input type='text' value={newName} onChange={(e) => (setNewName(e.target.value))} /> <button onClick={addItem} >add item</button> </div> ); } export default App;
todo app that I created with django-admin startproject todo.pip install djangorestframework Install APP #
rest_framwork as an INSTALLED_APP.INSTALLED_APPS = [ ... "rest_framework", ... ] create the api app #
setup.py, and setup.cfg are completely gone.
django.db.utils.OperationalError: no such table: auth_user INSTALLED_APPS, django.contrib.admin being one of them.python manage.py migrate
localhost.waylonwalker.com.settings.py and yolo, it worked first try. I am in from my remote location, and even have auth taken care of thanks to cloudflare. I am really hoping to learn how to setup my own auth with django as this is one of the things that I could really use in my toolbelt.
django-admin cli. To get this I am going the route of pipx it will be installed globally on my system in it’s own virtual environment that I don’t have to manage. This will be useful only for using startproject as far as I know.pipx install django django-admin startproject try_django cd try_django