On Monday, February 22, 2021 at 4:14:53 PM UTC+5:30, Peter Otten wrote:
> On 22/02/2021 06:57, gayatri funde wrote:
> > On Monday, February 22, 2021 at 11:15:27 AM UTC+5:30, Chris Angelico wrote:
> >> On Mon, Feb 22, 2021 at 4:41 PM gayatri funde <fundeg...@gmail.com> wrote:
> >>>
> >>> On Monday, February 22, 2021 at 10:47:57 AM UTC+5:30, Dan Stromberg
> >>> wrote:
> >>>> On Sun, Feb 21, 2021 at 9:10 PM gayatri funde <fundeg...@gmail.com>
> >>>> wrote:
> >>>>> Hello,
> >>>>>
> >>>>> Greetings!! Have a good day!
> >>>>>
> >>>>> This is regarding logging issue i am facing in my application. My
> >>>>> requirement is to create log on daily basis while my application is
> >>>>> running, So to do this i am creating new log file at midnight by
> >>>>> comparing
> >>>>> the day it starts and enter to new day with the while loop continuously
> >>>>> checking on date.
> >>>>>
> >>>>> In my application i have 2 processes, So what my observation is on the
> >>>>> day
> >>>>> of start of application both process are able to log into the file, but
> >>>>> as
> >>>>> new day starts new file getting created and only main process log are
> >>>>> getting written into new file, and other process is still writing to
> >>>>> old
> >>>>> day log.
> >>>>>
> >>>>> So could you please help me to understand this issue and it will be
> >>>>> great
> >>>>> to know solution if you can help me with this.
> >>>>>
> >>>> Is it possible each process has open a different "file" on the same
> >>>> pathname, with only one actually being visible in the filesystem?
> >>>>
> >>>> Linuxes and Unixes allow such things. I am unaware of Windows being
> >>>> powerful enough to do so, and besides there you'd probably use the Event
> >>>> Log anyway.
> >>>>
> >>>> If that's the case, I do not know of a Python logging-module way of
> >>>> correcting the problem, but you could introduce a third process that is
> >>>> used just for logging, and have the original two send their log messages
> >>>> to
> >>>> the new 3rd logging process.
> >>>
> >>>
> >>> Just to clarify, file names are different as i am appending date to each
> >>> file name. On new day start main process is writing to new day file and
> >>> another process is still writing to old date file. This i am trying on
> >>> Linux system.
> >>>
> >>> Thanks for suggestion of creating one dedicated process for logging. But
> >>> if you can help to find any is other reason why second process not able
> >>> to find the new day file handler object.
> >>> Thank you for your reply.
> >>>
> >> You'll need to show your code. Most likely, though, BOTH processes
> >> need to independently update to the new file.
> >>
> >> ChrisA
> >
> >
> > I have 2 files mainModule.py and loggingModule.py files as below:
> > In loggingModule.py file i am managing new log to create , which i am
> > importing to mainModule.py file.
> >
> > loggingModule.py
> [...]
> > def daily_log():
> > global firstTime
> >
> > try:
> > now = datetime.datetime.now()
> > log_day = now.day
> > initialize_logger("Log_start.log")
> > while True:
> Unless there is an exception you are forever stuck in this loop...
> > currentDate = datetime.datetime.now().day
> > time.sleep(60)
> >
> > if currentDate != log_day: # New day started
> > initialize_logger("Log_continue.log")
> >
> > except Exception as ex:
> > exc_type, exc_obj, tb = sys.exc_info()
> > template = "An exception of type {0} occurred at {1}. Arguments:\n{2!r}"
> > message = template.format(type(ex).__name__, tb.tb_lineno, ex.args)
> > logging.error(message)
> >
> >
> > daily_log()
> >
> >
> > mainModule.py
> >
> > import Logic_Check
> > import logging
> > import multiprocessing
> > from loggingModule import *
> ... and as the import implicitly invokes daily_log() you won't get here,
> i. e. the code below is not executed.
> > def child_Process(var1):
> > while True:
> > time.sleep(10)
> > logging.info('Log from Child Process')
> >
> > if __name__ == "__main__":
> > var1 = "LotsOfSunshine"
> > time.sleep(1)
> > logging.info("Log from Main process")
> >
> > child_Multiprocess = multiprocessing.Process(target=child_Process,
> > args=(var1,))
> > child_Multiprocess.start()
> >
daily_log() call is necessary in loggingModule.py because if we import
loggingModule.py module into mainModule.py, Import won't execute daily_log()
function by itself, either I make explicit call of daily_log() in mainModule.py
or loggingModule.py
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