[olpc-nz] [Testing] [OLPC-AU] Testing Summary: Auckland NZ - 19 March 2011
Richard A. Smith
richard at laptop.org
Tue Mar 22 21:49:20 EDT 2011
On 03/21/2011 08:26 AM, Paul Fox wrote:
> james wrote:
> > Looking at file pwr-CSN74804D7E-110319_092045.csv we see the first data
> > line is:
> > 1300492245,52,6379990,-1155598,3053,6583214,Discharging,startup
> > ... and this is ...
> > $ TZ=Australia/Darwin date --date=@1300492245
> > Sat Mar 19 09:20:45 CST 2011
> > ... which matches the DATE: line ...
> > DATE: Sat Mar 19 09:20:45 CST 2011
> to complicate things further, the next release of powerd will change
> that DATE: header to:
> DATE: $(date "+%F %T %z")
> i.e., it will look like:
> DATE: 2011-03-21 08:23:08 -0400
> the FORMAT: header will change from '2' to '3' at the same time.
> this change will make the date header language independent.
I'm sorry I broke you script. I forgot that you were using the DATE:
field. I had to change the date format to due to date parsing in my
program that processes the power logs. In order to be able to sort the
logs by date and do things like display the power vs time of day
(important for logs from PV panels) I need to have my program grok the
DATE: field and understand the timezone and as you have discovered its
quite a task. There are lots of issues to consider.
If you are trying to process dates in Python then you need
python-dateutil. For my Debian machine it was a simple apt-get away.
dateutil has a parser that will parse all of the date formats in all
versions of the logs correctly if you set the fuzzy=True option when you
call the parser so that it ignores unknown tokens. I had Paul change it
before I figured all that out. I decided though that the DATE: format
thats in the latest powerd is simpler and easier to parse from other
stuff besides python so I didn't change it back.
It should not need to change since the current format contains all the
necessary date info available.
Richard A. Smith <richard at laptop.org>
One Laptop per Child
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