'Opens the CSV files containing the equities ticks from
the specified CSV data directory, converting them into
them into a pandas DataFrame, stored in a dictionary.'

def _open_ticker_price_csv(self, ticker):

    ticker_path = os.path.join(self.csv_dir, ('%s.csv' % ticker))
    self.tickers_data[ticker] = pd.read_csv(ticker_path, names=['Date', 'Open', 'Low', 'High', 'Close', 'Volume', 'OpenInterest'], index_col='Date', parse_dates=True)
    self.tickers_data[ticker]['Ticker'] = ticker
