function to convert degree (hour), minute, seconds string to integer

[Paul McGuire]

<google0 at lazytwinacres.net> wrote in message
news:1153967597.980549.6940 at h48g2000cwc.googlegroups.com...
> I know this is a trivial function, and I've now spent more time
> searching for a surely-already-reinvented wheel than it would take to
> reinvent it again, but just in case... is there a published,
> open-source, function out there that takes a string in the form of
> "hh:mm:ss" (where hh is 00-23, mm is 00-59, and ss is 00-59) and
> converts it to an integer (ss + 60 * (mm + 60 * hh))?  I'd like
> something that throws an exception if hh, mm, or ss is out of range, or
> perhaps does something "reasonable" (like convert "01:99" to 159).
> Thanks,
>     --dang

In a froth of functionalism, here is my submission.

-- Paul


tests = """\
00:00:00
01:01:01
23:59:59
24:00:00
H1:00:00
12:34:56.789""".split("\n")

def time2secs(t,decimal=False):
    if decimal:
        tflds = map(float,t.split(":"))
    else:
        tflds = map(int,t.split(".")[0].split(":"))
    nomorethan = lambda (a,maxa) : 0 <= a < maxa
    if sum(map(nomorethan, zip(tflds,(24,60,60)))) == len(tflds):
        return reduce(lambda a,b: a*60+b, tflds)
    else:
        raise ValueError("invalid time field value in '%s'" % str(t))

for tt in tests:
    try:
        print time2secs(tt)
        print time2secs(tt,True)
    except Exception,e:
        print "%s: %s" % (e.__class__.__name__, e)