How to change filehandle with Python logging on the fly with different classes and imports

Question

I cannot perform an on-the-fly logging fileHandle change.

For example, I have 3 classes

one.py

import logging
class One():
    d         


        

Answer 1

I tried to implemented the suggestions on this page from @Martijn Pieters combined with @Arun Thundyill Saseendran. I'm too new to be allowed to comment so I have to post an adjusted answer. In the isinstance call, I had to use 'logging' instead of 'log' to get access to the types (log was an instance) and then the 'FileHander' should be 'FileHandler'. I'm using Python 3.6.

import logging

filehandler = logging.FileHandler('/tmp/logfile', 'a')
formatter = logging.Formatter('%(asctime)-15s::%(levelname)s::%(filename)s::%(funcName)s::%(lineno)d::%(message)s')
filehandler.setFormatter(formatter)
log = logging.getLogger()  # root logger - Good to get it only once.
for hdlr in log.handlers[:]:  # remove the existing file handlers
    if isinstance(hdlr,logging.FileHandler): #fixed two typos here
        log.removeHandler(hdlr)
log.addHandler(filehandler)      # set the new handler
# set the log level to INFO, DEBUG as the default is ERROR
logging.setLevel(log.DEBUG)