On Wed, Jul 1, 2015 at 2:06 PM, Victor Hooi <victorh...@gmail.com> wrote:
> Aha, cool, that's a good idea =) - it seems I should spend some time getting
> to know generators/iterators.
>
> Also, sorry if this is basic, but once I have the "block" list itself, what
> is the best way to parse each relevant line?
>
> In this case, the first line is a timestamp, the next two lines are system
> stats, and then a newline, and then one line for each block device.
>
> I could just hardcode in the lines, but that seems ugly:
>
> for block in parse_iostat(f):
> for i, line in enumerate(block):
> if i == 0:
> print("timestamp is {}".format(line))
> elif i == 1 or i == 2:
> print("system stats: {}".format(line))
> elif i >= 4:
> print("disk stats: {}".format(line))
>
> Is there a prettier or more Pythonic way of doing this?
This is where you get into the nitty-gritty of writing a text parser.
Most of the work is in figuring out exactly what pieces of information
matter to you. I recommend putting most of the work into the
parse_iostat() function, and then yielding some really nice tidy
package that can be interpreted conveniently.
ChrisA
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