6 Articles tagged “Python”

Today I am very pleased to announce the release of the book Scaling Python from my good friend Julien Danjou!

As Julien says, Python applications can handle millions of requests. Well, we know here that it’s easier on them when they are using PostgreSQL of course!

Business logic is supposed to be the part of the application where you deal with customer or user facing decisions and computations. It is often argued that this part should be well separated from the rest of the technical infrastructure of your code. Of course, SQL and relational database design is meant to support your business cases (or user stories), so then we can ask ourselves if SQL should be part of your business logic implementation. Or actually, how much of your business logic should be SQL?

Kris Jenkins cooked up a very nice way to embed SQL in your code: YeSQL for Clojure. The main idea is that you should be writing your SQL queries in .sql files in your code repository and maintain them there.

The idea is very good and it is now possible to find alternative implementations of the Clojure yesql library in other languages. Today, we are going to have a look at one of them for the python programming language: anosql.

While making progress with both Event Triggers and Extension Templates, I needed to make a little break. My current keeping sane mental exercise seems to mainly involve using Common Lisp, a programming language that ships with about all the building blocks you need. *Yes, that old language brings so much on the table* When using Common Lisp, you have an awesome interactive development environment where you can redefine function and objects while testing them.

pgloader is a tool to help loading data into PostgreSQL, adding some error management to the COPY command. COPY is the fast way of loading data into PostgreSQL and is transaction safe. That means that if a single error appears within your bulk of data, you will have loaded none of it. pgloader will submit the data again in smaller chunks until it’s able to isolate the bad from the good, and then the good is loaded in.