Array of dictionaries to group data

gistfile1.py

@app.route('/')
def landing():
    arts = Articles.query.\
            filter(Articles.active==True).\
            filter(Articles.ready==True).all() #.\
            #order_by(desc(Articles.created)).all()

    # get today's date
    today = datetime.date.today()

    articles_grouped = []
    for article in arts:
        date = article.created.date()
        found_date = False
        new_group = { "date": date, "articles": [article] }

        if len(articles_grouped) > 0:
            for group in articles_grouped:
                if group["date"] == date:
                    group["articles"].append(article)
                    found_date = True
                    break
            if not found_date:
                articles_grouped.append(new_group)
        else:
            articles_grouped.append(new_group)

    # sort list by date in descending order
    articles_grouped.sort(key=lambda d: d["date"], reverse=True)

    return render_template('landing.html', articles=articles_grouped)

# -------------    
@app.route('/')
def landing():
    arts = Articles.query.\
            filter(Articles.active==True).\
            filter(Articles.ready==True).all() #.\
            #order_by(desc(Articles.created)).all()

    # get today's date
    today = datetime.date.today()

    articles_grouped = {}
    for article in arts:
        curr_date = article.created.date()
        if curr_date in articles_grouped:
            articles_grouped[curr_date].append(article)
        else:
            articles_grouped[curr_date] = [article]
    articles = OrderedDict(sorted(articles_grouped.iteritems(), reverse=True))