On 13 août, 21:28, Dave Angel <da...@ieee.org> wrote:
> David wrote:
> > Thanks all for your answers. As suggested by Dave and Frank, I am
> > indeed looking for the main program to continue running in the
> > background (I have several functions I want to launch, each at a
> > predefined time interval). I like Frank's solution, on the paper it
> > seems it would do what I am looking for, but I cannot succeed in
> > having it working. I guess I've been stuck with this problem for too
> > long and can't succeed in using my brain accurately anymore... ;-)
>
> > I defined the class as defined by Frank, and I then inserted the
> > following code in a While True loop, without any other code (the idea
> > is just to test Frank's solution before really using it in my
> > program):
>
> > func = MyFunction()
> > func.start()
>
> > func.stop()
> > func.join()
>
> > However I'm not getting the expected behavior. It's not taking into
> > account the 30 sec wait, the function is called again and again
> > without any time interval... Any idea ?
>
> > Again, thanks a lot.
>
> Why don't you include the code you're actually trying, instead of just
> trying to describe it. Frank's class didn't call any function, it just
> had a place to do it. So we really don't know what you're running, nor
> what about it is wrong.
>
> Perhaps a few well placed print statements?
>
> DaveA
Yes, I guess it would be more simple. Here is really what I am trying
to do. I simplified the functions, but the purpose is to write some
text in a local file every x seconds (here, I'm just writing the
timestamp, i.e. a string representing the date & time, every 10
seconds) and to transfer this file to a distant server via FTP every y
seconds (20 seconds in the example below). My code is a little bit
more complicated because each time I transfer the file, I delete the
local file which is then recreated when data is written, but for
simplicity I left this out in the code below. So, here is the code
I've been using to test Frank's code. I've been struggling with using
or not a While True loop or not, and everything I try seems to run
into issues.
import threading
from datetime import datetime
import ftplib
class CFtpConnection:
"""FTP Connection parameters"""
def __init__(self, host, port, timeout, user, passwd):
self.host = ""
self.port = 21
self.timeout = 60
self.user = ""
self.passwd = ""
class CStoreData(threading.Thread):
"""Write timestamp in a file every 10 seconds in separate
thread"""
def __init__(self, timestamp):
threading.Thread.__init__(self)
self.event = threading.Event()
self.timestamp = timestamp
def run(self):
while not self.event.is_set():
file_handler = open("Test.txt", 'a')
file_handler.write(self.timestamp.strftime("%y%m%d%H%M%S
\n"))
file_handler.close()
self.event.wait(10)
def stop(self):
self.event.set()
class CTransferData(threading.Thread):
"""Transfer timestamp file every 20 seconds in separate thread"""
def __init__(self, ftp_connection):
threading.Thread.__init__(self)
self.event = threading.Event()
self.ftp_connection = ftp_connection
def run(self):
while not self.event.is_set():
file_handler = open("Test.txt", 'r')
Ftp_handler = ftplib.FTP('')
Ftp_handler.connect(self.ftp_connection.host,
self.ftp_connection.port, self.ftp_connection.timeout)
Ftp_handler.login(self.ftp_connection.user,
self.ftp_connection.passwd)
Ftp_handler.storbinary("STOR Test.txt", file_handler)
file_handler.close()
Ftp_handler.close()
self.event.wait(20)
def stop(self):
self.event.set()
ftp_connection = CFtpConnection("", 21, 60, "", "")
ftp_connection.host = '127.0.0.1'
ftp_connection.user = "admin"
ftp_connection.passwd = "admin"
while(1):
timestamp = datetime.now()
func_store_data = CStoreData(timestamp)
func_store_data.start()
func_transfer_data = CTransferData(ftp_connection)
func_transfer_data.start()
func_store_data.stop()
func_store_data.join()
func_transfer_data.stop()
func_transfer_data.join()
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