get_historical_prices_fundamental_function.py

def getPrices(df, ticker):
    """
    Gets the stock price at the time for each date in the financial statements for
    the given ticker and dataframe of financial information.
    """
    # Getting stock price at the time
    prices = client.get_prices_eod(ticker, period='d')
    
    prices = pd.DataFrame(prices).set_index('date')[['adjusted_close', 'close', 'volume']]

    # Converting to date time
    prices.index = pd.to_datetime(prices.index)

    # Filling in missing price data
    prices = prices.reindex(
        pd.date_range(prices.index[0], prices.index[-1]),
        method='ffill'
    )
    
    # Converting back to string for merging later
    prices.index = prices.index.strftime("%Y-%m-%d")
        
    price_dates = [i for i in prices.index if i in df.index]
    
    prices = prices.loc[price_dates]

    # Joining together
    df = df.join(prices, how='outer')
    
    return df