As @RW9 mentioned, this is not really an array.  Instead, you would be creating a single, long text string.  If you ever wanted to treat it as you would a Python array, and process each element within, you would need to basically undo your text string to get it back to the original, current form of the data.  And hope that none of the original PRODUCT values contains a comma.   The current form of the data is ideal for most types of processing.  Of course it depends on your objective, but if you were to post a little more on where you are heading with this, you are sure to get suggestions about how the current form of the data can be used to get there. ... View more