adding values from a csv column and getting the mean. beginner help

Mark Lawrence breamoreboy at
Wed Dec 11 21:20:21 CET 2013

On 11/12/2013 20:03, Chris Angelico wrote:
> On Thu, Dec 12, 2013 at 7:00 AM, Mark Lawrence <breamoreboy at> wrote:
>> I use the alternative X for a mandatory argument X.
> Also common, but how do you specify a keyword, then? Say you have a
> command with subcommands:
> $0 foo x y
> Move the foo to (x,y)
> $0 bar x y z
> Go to bar X, order a Y, and Z it [eg 'compress', 'gzip', 'drink']
> How do you show that x/y/z are mandatory args, but foo/bar are
> keywords to be typed exactly? In some formats italicized text can make
> that distinction, but not in pure text.
> ChrisA

Haven't a clue off the top of my head so read all about it here

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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