[Newbie] Need help with quick text proggy.

[Greg Krohn ("X", "@")]

"Greg Krohn" <"gkrohnXvolucris.8m.com".replace("X", "@")> wrote in message
news:ao39el02bel at enews1.newsguy.com...
>
> "Corey Woodworth" <schitz0boy at hotmail.com> wrote in message
> news:24d8090a.0210091854.725f4c9f at posting.google.com...
> > I havn't programmed in python in a while (not since 2.0) but I just
> > found myself in a predicament where I really need to write a program
> > and write it fast. Python still seems to be the best choice even
> > though I'm very rusty and wasn't to good to start with. Here is my
> > problem. I've got a text file that is a list of elements. a time
> > followed by a number on each line. Like this for example:
> >
> > 1:46p 65
> > 5:45a 99
> > 2:36p 88
> > 10:53a 79
> > 5:10a 86
> > 2:43p 169
> > 10:14a 55
> >
> > I just found out that all my times are 6 hours off. (AARGH!) and I
> > need some help writing a program that will update all those timestamps
> > for me. Any help at all is appreciated, wheter it be links, some
> > source, or whatever. Thank a bunch.
> >
> > Corey
>
> How's this:
>
[ SNIP My original crappy code.]

That worked with your sample data, but not in all cases. Try this:


fin = file('your/source/file', 'r')
fout = file('your.output.file', 'w')

for line in fin:
    try:
        colon = line.find(':')
        hour = int(line[:colon])
    except ValueError:
        print 'Invalid hour: %s' % line
        continue

    try:
        space = line.find(' ')
        minute = int(line[colon + 1: space - 1])
    except ValueError:
        print 'Invalid minute: %s' % line
        continue

    ampm = line[space - 1: space]
    if ampm == 'p':
        hour += 12
    elif ampm != 'a':
        print 'Invalid am/pm indentifier: %s' % line
        continue

    value = line[space + 1:]

    hour += 6
    hour = hour % 24

    if hour > 12:
        hour -= 12
        ampm = 'p'
    else:
        ampm = 'a'

    if hour == 0:  #This is what I added
        hour = 12  #the second time around.

    fout.write('%d:%d%s %s' % (hour, minute, ampm, value))

fin.close()
fout.close()