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Re: Looking for direction

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  Re: Looking for direction Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-14 00:36 +0100

#90590 — Re: Looking for direction

On 14/05/2015 00:24, 20/20 Lab wrote:
> I'm a beginner to python.  Reading here and there.  Written a couple of
> short and simple programs to make life easier around the office.

Welcome :)

>
> That being said, I'm not even sure what I need to ask for. I've never
> worked with external data before.
>
> I have a LARGE csv file that I need to process.  110+ columns, 72k
> rows.  I managed to write enough to reduce it to a few hundred rows, and
> the five columns I'm interested in.
>
> Now is were I have my problem:
>
> myList = [ [123, "XXX", "Item", "Qty", "Noise"],
>             [72976, "YYY", "Item", "Qty", "Noise"],
>             [123, "XXX" "ItemTypo", "Qty", "Noise"]    ]
>
> Basically, I need to check for rows with duplicate accounts row[0] and
> staff (row[1]), and if so, remove that row, and add it's Qty to the
> original row. I really dont have a clue how to go about this.  The
> number of rows change based on which run it is, so I couldnt even get
> away with using hundreds of compare loops.
>
> If someone could point me to some documentation on the functions I would
> need, or a tutorial it would be a great help.
>
> Thank you.

Check this out http://pandas.pydata.org/

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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