vigo

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

vigo

class PubSub(object):
    """
    Very simple Pub/Sub pattern wrapper
    using simplified Redis Pub/Sub functionality.

    Usage (publisher)::

        import redis

        r = redis.Redis()

vigo

Workflows (States) in Django

I'm going to cover a simple, but effective, utility for managing state and transitions (aka workflow). We often need to store the state (status) of a model and it should only be in one state at a time.

Common Software Uses

• Publishing (Draft->Approved->Published->Expired->Deleted)

vigo

# https://hakibenita.com/how-to-turn-django-admin-into-a-lightweight-dashboard

from django.contrib import admin
from django.db.models import Count, Sum, Min, Max, DateTimeField)
from django.db.models.functions import Trunc

from . import models


def get_next_in_date_hierarchy(request, date_hierarchy):

vigo

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

vigo

:root {
 --violation-color: red; /* used for clear issues */
 --warning-color: orange; /* used for potential issues we should look into */
}

/* IMAGES */

/*
 * Lazy-Loaded Images Check
 * ====

vigo

VERSION = \"1.0.0\"

PREFIX ?= out
INCDIR	= inc
SRCDIR	= src
LANG	= c
OBJDIR	= .obj

MODULE		= binary_name
CC		= gcc