[Tutor] incrementing one minute

[pa yo]

I am trying to filter Open Street Map nodes from

http://planet.openstreetmap.org/minute/

... into wikimark up for Yellowikis (http://www.yellowikis.org)

 I work from home - but this isn't a homework assignment. :-)

Paul Y

On Mon, Mar 30, 2009 at 5:52 PM, Dave Angel <davea at ieee.org> wrote:
> This is the second post I've seen on this homework assignment.  You might
> look at the Python List for other ideas.
>
> mktime() and gmtime() are not inverses of each other.  The first assumes
> local time, and the latter gmt (or utc).  So unless you happen to be in
> England, and not in daylight savings time, you'd expect a problem.
>
> mktime() is documented as the inverse of localtime(), according to the docs.
>  I'd assume they'd both make the same time adjustments for your location.
>  However, there's some ambiguity if the time you're looking at is in
> standard time, while you're currently in daylight savings.  So I'd look for
> an answer that only used UTC (or Greenwich Mean time).
>
> Try time.gmtime(), and calendar.timegm()
>
>
> pa yo wrote:
>
>> I need to add one minute to a string that has a date and a time in
>> YYYYMMDDHHMM format.
>> e.g:  200903281346 should become 200903281347
>>
>> the following script converts the string into time and adds one
>> minute; but somehow I also add an hour and I don't understand why.
>>
>> ====================
>>
>> import time
>>
>> #set the initial time as a string and convert it into time format:
>> fromtimestring = '200903281346'
>> fromtimetime = time.strptime(fromtimestring, "%Y%m%d%H%M")
>> #convert this time format into UNIX time (seconds since the start of UNIX
>> time):
>> fromtimeseconds = time.mktime(fromtimetime)
>> #add 60 seconds and reformat the result into the YYYYMMDDHHMM format
>> totimeseconds = fromtimeseconds + 60
>> totimetime = time.gmtime(totimeseconds)
>> # convert the new time into a string:
>> totimestring = time.strftime("%Y%m%d%H%M", totimetime)
>>
>> #print the results:
>> print (fromtimestring)
>> print (fromtimetime)
>> print (totimetime)
>> print (totimestring)
>>
>> ================
>>
>> any help or suggestions would be much appreciated.
>>
>>
>> Payo
>>
>>
>
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