Re: [Tutor] Could I have used time or datetime modules here?

[Dick Moores]

Thanks, Brian. I looked at your code a long time, and also read the 11/26 
thread you started. I can see how I could use datetime() and your t2 - t1 
to get the seconds for time.sleep(), but  the resulting code I have in 
mind is more convoluted than the heart of my timer3.py, which I quote 
below.  (I don't need the alarm time to be more than 24 hours from 
current time--therefore I want to ignore the year, month, and day.)

=======================================
import time
alarm = raw_input("Enter alarm time as hhmm: ")
now = time.strftime("%X")  # produces current time in format  hh:mm:ss
nowSecond = int(now[6:])
nowMinute = int(now[3:5])
nowHour = int(now[0:2])
alarmMinute = int(alarm[2:4])
alarmHour = int(alarm[0:2])
hoursDiff = alarmHour - nowHour
minutesDiff = alarmMinute - nowMinute
if hoursDiff < 0 or (hoursDiff == 0 and minutesDiff <= 0):
    hoursDiff = hoursDiff + 24 # add a day
sleepSeconds = hoursDiff*3600 + minutesDiff*60 - nowSecond
time.sleep(sleepSeconds)
====================================
If I'm wrong, could someone please set me right?
Dick
Brian van den Broek wrote at 09:54 12/5/2004:
Dick Moores said unto the world upon 2004-12-05 11:17:
I'm wondering if my timer3.py could have been written more simply and 
easily by using the time or datetime modules to get the number of 
seconds separating the time now and the time to which the alarm is set.
IOW, is there an easier way to calculate the time difference between 
the time now, say 08:51 and say, tomorrow at 03:45, to take an example 
of the most difficult case?
See timer3.py at
<http://www.rcblue.com/Python/timer3_ForWeb.py>
Thanks, tutors.
Dick Moores
[EMAIL PROTECTED]
Hi Dick and all,
as you may recall, it was a week or so ago that I was show how to use 
datetime, so I'd be cautious about using my suggestion without testing :-)

But, does this do what is wanted?
<code with Python 2.4>
import datetime
def dif_in_seconds(dif):
    return dif.days * (24 * 60 * 60) + dif.seconds
t1 = datetime.datetime(2004, 12, 5, 8, 51, 00)
t2 = datetime.datetime(2004, 12, 6, 15, 45, 00)
dif = t2 - t1
seconds_dif = dif_in_seconds(dif)
print seconds_dif
</code>
with output
>>>
111240
I didn't check your link, or read your thread closely, so I don't know 
if this counts as "easier". But it does look pretty darned easy :-)

Best,
Brian vdB

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