I have multiple CSV files (one for each stock symbol) which I want to load into a nested dictionary like:

```
market_data["Symbol"] = { "Open": [], "High": [], "Low": [], "Close": [],
    "Volume": [], "Adjusted": [], "Date": [], "MA_10":[] }

```

I have a different CSV file for each symbol and each CSV file has the data such as Open, High, Low, etc. but not necessarily the same name. I want to load it into that data structure but I'm not able to figure it out.

I want it to look like :

> 
> print market\_data
> 
> 
> {'SYMBOL2': {'High': [20, 22, 23, 19, 21], 'Volume': [100, 200, 300,
>  400, 500], 'Adjusted': [12, 13, 14, 15, 16], 'Low': [10, 12, 13, 9,
>  1], 'MA\_10': [], 'Date': ['2015-01-01', '2015-01-02', '2015-01-03',
>  '2015-01-04', '2015-01-05'], 'Close': [15, 15, 15, 11, 16], 'Open':
>  [12, 13, 14, 15, 16]}, 'SYMBOL1': {'High': [20, 22, 23, 19, 21],
>  'Volume': [100, 200, 300, 400, 500], 'Adjusted': [12, 13, 14, 15, 16],
>  'Low': [10, 12, 13, 9, 1], 'MA\_10': [], 'Date': ['2015-01-01',
>  '2015-01-02', '2015-01-03', '2015-01-04', '2015-01-05'], 'Close': [15,
>  15, 15, 11, 16], 'Open': [12, 13, 14, 15, 16]}}
> 
> 
>