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# coding: utf-8

from django.core.exceptions import ValidationError
from django.core.files.images import get_image_dimensions
from django.utils.translation import ugettext_lazy as _
from django.utils.deconstruct import deconstructible


@deconstructible
class ImageDimensionsValidator:

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import random
import string
from django.utils.text import slugify

def random_string_generator(size=10, chars=string.ascii_lowercase + string.digits):
    return ''.join(random.choice(chars) for _ in range(size))

def unique_slug_generator(instance, new_slug=None):
    if new_slug is not None:
        slug = new_slug

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''' Useage ''''
    # Declare our item
    store = Store.objects.get(pk=pk)
    # Define our models
    stores = Store.objects.all()
    # Ask for the next item
    new_store = get_next_or_prev(stores, store, 'next')
    # If there is a next item
    if new_store:
        # Replace our item with the next one

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from django.contrib import admin
from example.models import Example


class ExampleAdmin(admin.ModelAdmin):
    """
    Don't allow addition of more than one model instance in Django admin
    See: http://stackoverflow.com/a/12469482
    """
    def has_add_permission(self, request):

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from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
from django.conf import settings

from robot.config import ROBOT_CELERY_BEAT_SCHEDULE


os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'test.settings')

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/* Useful celery config.

app = Celery('tasks',
             broker='redis://localhost:6379',
             backend='redis://localhost:6379')

app.conf.update(
    CELERY_TASK_RESULT_EXPIRES=3600,
    CELERY_QUEUES=(
        Queue('default', routing_key='tasks.#'),

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/*
 * Only useful in changelist pages when the ModelAdmin displayed has 
 * "list_editable" (https://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.list_editable)
 * configured.
 *
 * When one of the input/select/textarea value is changed, automatically submit
 * the form using ajax.
 *
 * Only form fields relevant to the "list_editable" will trigger a form submit.
 *

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#!/usr/bin/env python

"""Download a file from ftp server."""

import argparse
import logging
import os

from ftplib import FTP_TLS

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🎵 How to record audio using the Web Audio API in JavaScript

About this article

This article describes how to record audio using the Web Audio API in JavaScript. The related resources are shown below.

• Demo
• Demo video