Python logging to console

The problem comes from the call to basicConfig which sets up a log handler for stderr and also accepts a format string, not a formatter. Because you are doing this work yourself later, you don't need to use the basicConfig function. More information can be found in the python documentation.

Removing the call to basicConfig, and adding a self.log.setLevel(self.log_level) will fix the issue you are seeing.

Working code:

import logging                                                                  import sys                                                                      class Temp:                                                                         def __init__(self, is_verbose=False):                                               # configuring log                                                               if (is_verbose):                                                                    self.log_level=logging.DEBUG                                                else:                                                                               self.log_level=logging.INFO                                                 log_format = logging.Formatter('[%(asctime)s] [%(levelname)s] - %(message)s')        self.log = logging.getLogger(__name__)                                          self.log.setLevel(self.log_level)                                               # writing to stdout                                                             handler = logging.StreamHandler(sys.stdout)                                     handler.setLevel(self.log_level)                                                handler.setFormatter(log_format)                                                self.log.addHandler(handler)                                                    # here                                                                          self.log.debug("test")                                                  if __name__ == "__main__":                                                          t = Temp(True)

Looking through a similar issue on the Python bug tracker (https://bugs.python.org/issue16368), you can see that the formatter argument is expected to be a string (hence the attempt to invoke find):

log_format = '[%(asctime)s] [%(levelname)s] - %(message)s'logging.basicConfig(level=self.log_level, format=log_format)