python time

[ecu_jon]

On Mar 20, 10:09 pm, Dave Angel <da... at ieee.org> wrote:
> On 01/-10/-28163 02:59 PM, ecu_jon wrote:
>
>
>
> > I'm working on a script that will run all the time. at time specified
> > in a config file, will kick-off a backup.
> > problem is, its not actually starting the job. the double while loop
> > runs, the first comparing date works. the second for hour/min does
> > not.
>
> > #python file
> > import os,string,,time,getpass,ConfigParser
> > from datetime import *
> > from os.path import join, getsize
> > from time import strftime,localtime
>
> > config = ConfigParser.ConfigParser()
> > config.read("config.ini")
> > source = config.get("myvars", "source")
> > destination = config.get("myvars", "destination")
> > date = config.get("myvars", "date")
> > time = config.get("myvars", "time")
> > str_time=strftime("%H:%M",localtime())
>
> > while datetime.now().weekday() == int(date):
> >      while str_time == time:
> >          print "do it"
>
> You're comparing two objects in that inner while-loop, but since they
> never change, they'll never match unless they happen to start out as
> matched.
>
> you need to re-evaluate str_time each time through the loop.  Make a
> copy of that statement and put it inside the loop.
>
> You probably don't want those loops to be comparing to ==, though, since
> if you start this script on some other day, it'll never loop at all.
> Also, it'd be good to do some form of sleep() function when you're
> waiting, so you don't bog the system down with a busy-loop.
>
> DaveA

i guess im just having a hard time creating something like
check if go condition,
else sleep

the double while loops take 12% cpu usage on my machine so this is
probably unacceptable.
also the sleep command does not like me :
 >>> from datetime import *
>>> from time import strftime,localtime,sleep
>>> time.sleep(3)

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    time.sleep(3)
AttributeError: type object 'datetime.time' has no attribute 'sleep'
>>>

here it is updated with the hour/min check fixed.
#updated python code
import os,string,time,getpass,md5,ConfigParser
from datetime import *
from os.path import join, getsize
from time import strftime,localtime,sleep

config = ConfigParser.ConfigParser()
config.read("config.ini")
date = config.get("myvars", "date")
time = config.get("myvars", "time")

while datetime.now().weekday() == int(date):
    str_time=strftime("%H:%M",localtime())
    while str_time == time:
        print "do it"