scheduled functions

[ground_]

hello all,

today i wanted to write a program which execute a few functions at a given date/time, and i can't figure out how. here is what Iwant to achieve:

I would like to let a python script run for a week, and i want it to do 3 functions every day (at a given time):
- every day at 8:00 print(" good morning")
- every day at 13:00 print (" good evening")
- every day at 19:00 print("good night")
at the end of the week I want it to end the script or shutdown the PI (anything as long as the script stops)

I looked into it all day, but i couldn't find a good solution.

I know i can set the rpi up so it starts a python script at a given time (with crontab), but i don't want that.

I also puzzled a lot with APScheduler, but it throws me a bunch of errors after I start it. (errors below if anyone interested)

Code: Select all

Traceback (most recent call last):
  File "start.py", line 64, in <module>
    menu()
  File "start.py", line 35, in menu
    options.run()
  File "/home/pi/options.py", line 243, in run
    schedulerun()
  File "/home/pi/options.py", line 122, in schedulerun
    schedule = BackgroundScheduler()
  File "/usr/local/lib/python3.2/dist-packages/APScheduler-3.0.1-py3.2.egg/apscheduler/schedulers/base.py", line 61, in __init__
    self.configure(gconfig, **options)
  File "/usr/local/lib/python3.2/dist-packages/APScheduler-3.0.1-py3.2.egg/apscheduler/schedulers/base.py", line 95, in configure
    self._configure(config)
  File "/usr/local/lib/python3.2/dist-packages/APScheduler-3.0.1-py3.2.egg/apscheduler/schedulers/background.py", line 27, in _configure
    super(BackgroundScheduler, self)._configure(config)
  File "/usr/local/lib/python3.2/dist-packages/APScheduler-3.0.1-py3.2.egg/apscheduler/schedulers/base.py", line 576, in _configure
    self.timezone = astimezone(config.pop('timezone', None)) or get_localzone()
  File "/usr/local/lib/python3.2/dist-packages/tzlocal-1.1.2-py3.2.egg/tzlocal/unix.py", line 108, in get_localzone
  File "/usr/local/lib/python3.2/dist-packages/tzlocal-1.1.2-py3.2.egg/tzlocal/unix.py", line 61, in _get_localzone
  File "/usr/local/lib/python3.2/dist-packages/pytz-2014.7-py3.2.egg/pytz/__init__.py", line 173, in timezone
  File "/usr/local/lib/python3.2/dist-packages/pytz-2014.7-py3.2.egg/pytz/lazy.py", line 150, in _lazy
  File "/usr/local/lib/python3.2/dist-packages/pytz-2014.7-py3.2.egg/pytz/lazy.py", line 97, in _lazy
  File "/usr/local/lib/python3.2/dist-packages/pytz-2014.7-py3.2.egg/pytz/__init__.py", line 1073, in <genexpr>
  File "/usr/local/lib/python3.2/dist-packages/pytz-2014.7-py3.2.egg/pytz/__init__.py", line 102, in resource_exists
  File "/usr/local/lib/python3.2/dist-packages/pytz-2014.7-py3.2.egg/pytz/__init__.py", line 95, in open_resource
  File "/home/pi/di/pkg_resources.py", line 949, in resource_stream
    self, resource_name
  File "/home/pi/di/pkg_resources.py", line 1379, in get_resource_stream
    return StringIO(self.get_resource_string(manager, resource_name))
  File "/home/pi/di/pkg_resources.py", line 1956, in StringIO
    return StringIO(*args,**kw)
TypeError: initial_value must be str or None, not bytes

Another idea is to input the start date as a string and compare it to the current date. As long as it doesn't match the current date then sleep for a second and do it again. As soon as it is the same as the current date execute another function. But I have the idea this could be done easier, am I correct?

thanks in advance!

[DougieLawson]

Why not use crontab to drive a python program at various times during the day.

crontab -e

0 8 * * * /home/pi/python/saygoodmorning.py
0 13 * * * /home/pi/python/saygoodafternoon.py
0 19 * * * /home/pi/python/saygoodnight.py

[ground_]

Well, i know that is possible, but as i said i dont like that for my script, mainly becausethe following reason:

When the program is running, it will also keep a log file (where is prints some variables in a text file, and one of the variable is changing at 8:00 every day). I already got this working fine.

[paddyg]

It's cropped up on this forum before. The most recent thing I commented on was this http://www.raspberrypi.org/forums/viewt ... p625521but search around.

[ground_]

thanks a lot!,

well i have decided to do it with a combination of the datetime, time.sleep and thread module. Basicly have a function which will shutdown the rpi after a time.sleep(n) (where n is the timedifference between now and the given end date). if anybody is interested here is the code:

Code: Select all

def end():
        time.sleep(endtimer)
        os.system("shutdown -r now")

Code: Select all

endtimer = int((datetime.datetime(eyear,emonth,eday,ehour,eminute)-datetime.datetime.now()).total_seconds())
         starttimer = int((datetime.datetime(syear,smonth,sday,shour,sminute)-datetime.datetime.now()).total_seconds())

    if starttimer > 0:
        print("the test start at %s/%s/%s - %s:%s f"%(smonth,sday,syear,shour,sminute,))
        threading.Thread(target = end).start()
        time.sleep(starttimer)
        runled()

[klintkrossa]

Hello,
The others will be smaller. I like python3 I find that it will not return until the out side job is done I did have a cple problems with bash doing that.
here is my program modified for you.

Code: Select all

import time
import datetime

AddDay = False
ChangeTime = False
try:
    while True:
        ts = time.time()        
        date_time = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S')
        Y = int(datetime.datetime.fromtimestamp(ts).strftime('%Y'))
        m = int(datetime.datetime.fromtimestamp(ts).strftime('%m'))
        H = int(datetime.datetime.fromtimestamp(ts).strftime('%H'))
        if ChangeTime == True:#8:00 13:00 19:00
            if H > 8 and H < 1:
                H = 13
                print(date_time)
                print('print(" good morning")')
                pass
            elif H > 13 and H < 19:
                H = 19
                print(date_time)
                print('13:00 print (" good evening")')
                pass
            elif H > 19:
                H = 8
                AddDay = True
                print(date_time)
                print('19:00 print("good night")')
                pass
            else:
                time.sleep(60)
                pass
        d = int(datetime.datetime.fromtimestamp(ts).strftime('%d'))
        if AddDay == True:
            d = d + 1
            pass
        M = int(datetime.datetime.fromtimestamp(ts).strftime('%M'))
        S = int(datetime.datetime.fromtimestamp(ts).strftime('%S'))
        Date = datetime.datetime(Y,m,d,H,M,S)
        unixtime = time.mktime(Date.timetuple())
        diference = unixtime - ts
        if diference < 0:
            ChangeTime = True
            print('do Work')
            time.sleep(6)
            pass
        else:
            AddDay = False
            time.sleep(diference)
except KeyboardInterrupt:
    pass

The first run will not be accurate. I have not run it for 24 hours either, so there will be bugs that you will have to sort out.

[paddyg]

You can actually use the time module on its own with struct_time in a more compact way by extracting and feeding in tuples, like this

Code: Select all

import time

AddDay = False
ChangeTime = False
try:
    while True:
        (Y, m, d, H, M, S, _, _, _) = time.localtime()
        if ChangeTime:
            if H > 8 and H < 1:
                H = 13
...
            else:
                time.sleep(60)
        if AddDay:
            d += 1
        diff = time.mktime(time.struct_time((Y, m, d, H, M, S, -1, -1, -1))) - time.time()

PS also you only need 'pass' where there is no other statement in that block.

[klintkrossa]

Thanks that should cut some of the fat.
Yes I do know that "pass " is not needed, I use it to make the editor check my indents.

You can actually use the time module on its own with struct_time in a more compact way by extracting and feeding in tuples, like this

Code: Select all

import time

AddDay = False
ChangeTime = False
try:
    while True:
        (Y, m, d, H, M, S, _, _, _) = time.localtime()
        if ChangeTime:
            if H > 8 and H < 1:
                H = 13
...
            else:
                time.sleep(60)
        if AddDay:
            d += 1
        diff = time.mktime(time.struct_time((Y, m, d, H, M, S, -1, -1, -1))) - time.time()

PS also you only need 'pass' where there is no other statement in that block.