jackton1

from django.contrib.postgres.forms import DateTimeRangeField
from django.core.exceptions import ImproperlyConfigured
from django_filters import DateTimeFromToRangeFilter as DateTimeFromToRangeGenericFilter


class DateTimeTZFromToRangeFilter(DateTimeFromToRangeGenericFilter):
    field_class = DateTimeRangeField
    lookup_names = {
        'contained_by', 'contains', 'overlap', 'fully_lt', 'full_gt',
        'not_lt', 'not_gt', 'adjacent_to',

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`.

jackton1

Build your sphinx document

Assumes you already have a sphinx project installed and a project created

make html

By default this command will build documentation to _build/html

jackton1

'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

jackton1

1. Change your database RDS instance security group to allow your machine to access it.
   • Add your ip to the security group to acces the instance via Postgres.
2. Make a copy of the database using pg_dump
   • $ pg_dump -h <public dns> -U <my username> -f <name of dump file .sql> <name of my database>
   • you will be asked for postgressql password.
   • a dump file(.sql) will be created
3. Restore that dump file to your local database.
   • but you might need to drop the database and create it first
   • $ psql -U <postgresql username> -d <database name> -f <dump file that you want to restore>

• the database is restored

jackton1

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

jackton1

https://www.postgresql.org/docs/9.3/functions-range.html

from django.contrib.postgres.fields import RangeField
from django.db import models

# Is the lower bound infinite?
@RangeField.register_lookup
class LowerInf(models.Transform):

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.

jackton1

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 datetime import datetime, timedelta

import boto3
from dateutil.tz import UTC

client = boto3.client('iam')

fifteen_days_ago = datetime.now(tz=UTC) - timedelta(days=15)

paginator = client.get_paginator('list_roles')