sameerkumar18

# Add this code in any Django app's admin.py
# Works for all Task Statuses; you can filter them in line 12.

import ast
import importlib
import json

from django.contrib import admin
from django.contrib import messages
from django.utils.safestring import mark_safe

jackton1

from collections import OrderedDict

from rest_framework.fields import SkipField
from rest_framework.relations import PKOnlyObject


class RestrictedFieldsSerializerMixin(object):
    """
    API Serializer mixin which provides support for restricting serialized data to only a subset of fields.

zulhfreelancer

Add the following snippet at the bottom of ~/.zshrc file.

Option 1 - Just time

RPROMPT='[%D{%L:%M:%S}] '$RPROMPT

1st1

import pyrsistent
import immutables
import time

I = 1_000_000
KEY = '5'


for N in [5, 10, 20, 30, 100, 200, 300, 400, 500, 1000]:
    print('=============')

jackton1

from django.db import ProgrammingError, models
from django.db.models.constants import LOOKUP_SEP
from django.db.models.query import normalize_prefetch_lookups
from rest_framework import serializers
from rest_framework.utils import model_meta

class OptimizeModelViewSetMetaclass(type):
    """
    This metaclass optimizes the REST API view queryset using `prefetch_related` and `select_related`
    if the `serializer_class` is an instance of `serializers.ModelSerializer`.

theburningmonk

'use strict';

const co           = require('co');
const EventEmitter = require('events');
const Promise      = require('bluebird');
const AWS          = require('aws-sdk');
const ssm          = Promise.promisifyAll(new AWS.SSM());

const DEFAULT_EXPIRY = 3 * 60 * 1000; // default expiry is 3 mins

majackson

Django Migrations without Downtime

The following instructions describe a set of processes allowing you to run Django database migrations against a production database without having to bring the web service down.

Note that in the below instructions, migrations are all run manually at explicit points, and are not an automatic part of the deployment process.

Adding Fields or Tables

Adding a (nullable) field or a new table

1. Make the model or column addition in your code.

wolever

import time

import redis


def get_redis_connection():
    return redis.connect()

class TaskDebouncer(object):
    """ A simple Celery task debouncer.

Bouke

Previous versions used homebrew to install the various versions. As suggested in the comments, it's better to use pyenv instead. If you are looking for the previous version of this document, see the revision history.

$ brew update
$ brew install pyenv
$ pyenv install 3.5.0
$ pyenv install 3.4.3
$ pyenv install 3.3.6
$ pyenv install 3.2.6
$ pyenv install 2.7.10

$ pyenv install 2.6.9

mobilemind

# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName