How to use variable in python 3 logger filename?

Question

Hi I want my python script to print minute wise log so I want variable b to be replaced but its not happening and log file generating with name %(b)s_python.log

Please Help !

import logging, datetime

a=datetime.date.today()

b=a.strftime("%y_%B_%a_%H%M")

print(b)

logging.basicConfig(filename="D:\%(b)s_python.log",level=logging.DEBUG,format="%(levelname)s %(asctime)s-%(message)s")

logging.debug("Hi Sudhirrrrrrrrr")

You will need a special logging handler for that. See the docs about logging handlers for details. — Klaus D.
– Klaus D., Commented Dec 23, 2018 at 7:20
you'll need to specify the %b in the format section and not the filename. — ParvBanks
– ParvBanks, Commented Dec 23, 2018 at 8:04
Did you try filename="D:\{0}_python.log".format(b),level=logging.DEBUG,format="{0} {1}-{2}".format(levelname, asctime, message)? — Andersson
– Andersson, Commented Dec 23, 2018 at 9:54

Bitto · Accepted Answer · 2018-12-23 10:14:46Z

1

datetime.date.today() does not give you the current hour and minute.

import logging, datetime
a=datetime.datetime.now()
b='D:\\'+a.strftime("%y_%B_%a_%H%M")+'s_python.log'
print(b)
logging.basicConfig(filename=b,level=logging.DEBUG,format="%(levelname)s %(asctime)s-%(message)s")
logging.debug("Hi Sudhirrrrrrrrr")

answered Dec 23, 2018 at 10:14

Bitto

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