Retreive table of market data ("Close", "Volume", "Adj Close") for each symbol requested

    >>> dfdict = get_dataframes('GOOG', 'SNE')

def get_dataframes(symbols=("sne", "goog", "tsla"), source='yahoo', refresh=False):
    """Retreive table of market data ("Close", "Volume", "Adj Close") for each symbol requested

    >>> dfdict = get_dataframes('GOOG', 'SNE')
    """
    symbols = util.make_symbols(list(symbols))
    if refresh:
        symbols_to_refresh = symbols
    else:
        symbols_to_refresh = [sym for sym in symbols if not Equity.objects.filter(symbol=sym).exists()]
    source = source.lower().strip()
    if source in ('yahoo', 'google'):
        source += '_finance'
    if source[:3] == 'fed':
        source = 'federal_reserve_economic_data'
    ccpanda = ccp.ConcurrentPandas()
    # set the data source
    getattr(ccpanda, "set_source_" + source)()
    if symbols_to_refresh:
        # tell concurrent pandas which keys/symbols to retrieve
        ccpanda.insert_keys(symbols_to_refresh)
        # start concurrentpandas threads
        ccpanda.consume_keys_asynchronous_threads()
        # FIXME: is there a better/faster iterator to use like `ccpanda.output_map` attribute?
        pseudodict = ccpanda.return_map()
    else:
        pseudodict = {}
    table = {}
    for sym in symbols:
        e, created = None, False
        if not sym in symbols_to_refresh:
            e, created = Equity.objects.get_or_create(symbol=sym)
        if created or not e or not e.time_series or sym in symbols_to_refresh:
            e, created = Equity.objects.get_or_create(
                symbol=sym,
                name=sym,  # FIXME: use data source to find equity name!
                time_series=pseudodict[sym].to_json(),
                )
        table[sym] = pd.io.json.read_json(path_or_buf=e.time_series, orient='columns', typ='frame', convert_dates=True)
    return table