Feb-28-2022, 03:47 PM
I am using Python 3.6.0 :: Continuum Analytics, Inc. on Linux.
I have ContextFilter Class in my python script which I am using to have a counter variable in log formatter. It works as expected and prints value of incremented variable in log.
But when I try to move this Class to a custom module that I have created it always prints the initial value of variable and not the incremented value. Obviously I am missing something.
Contents of module log_format.py:
I have ContextFilter Class in my python script which I am using to have a counter variable in log formatter. It works as expected and prints value of incremented variable in log.
But when I try to move this Class to a custom module that I have created it always prints the initial value of variable and not the incremented value. Obviously I am missing something.
Contents of module log_format.py:
import logging import datetime as dt # As I need date in 2022-02-22 16:42:44.289193 format class Formatter(logging.Formatter): converter=dt.datetime.fromtimestamp def formatTime(self, record, datefmt=None): ct = self.converter(record.created) if datefmt: s = ct.strftime(datefmt) else: t = ct.strftime("%Y-%m-%d %H:%M:%S") s = "%s,%03d" % (t, record.msecs) return s #class ContextFilter(logging.Filter): # RUN 2 # def __init__(self, i): # RUN 2 # self.i = i # RUN 2 # # RUN 2 # def filter(self, record): # RUN 2 # record.log_count = self.i # RUN 2 # return True # RUN 2Contents of python script log_format_test.py
import os import sys import logging py_lib = os.environ.get('app_dir') + "/lib" sys.path.append(py_lib) import log_format as lf class ContextFilter(logging.Filter): # RUN 1 def filter(self, record): # RUN 1 record.log_count = i # RUN 1 return True # RUN 1 logger = logging.getLogger(__name__) l_level = 'INFO' #'DEBUG' #'INFO' l_level = eval("logging." + l_level.upper()) logger.setLevel(l_level) int_var = os.getpid() i = 0 str_var = os.path.basename(__file__) handler = logging.StreamHandler() handler.setLevel(l_level) lf_format = f'ZZZZZZZZ|%(asctime)s|{int_var}|%(log_count)s|{str_var}|%(message)s' formatter = lf.Formatter(fmt=lf_format, datefmt='%Y-%m-%d %H:%M:%S.%f') # 2022-02-22 16:42:44.289193 logger.addFilter(ContextFilter()) # RUN 1 #logger.addFilter(lf.ContextFilter(i)) # RUN 2 handler.setFormatter(formatter) logger.addHandler(handler) i += 1; logger.info("I am INFO 0") i += 1; logger.info("I am INFO 1") i += 1; logger.debug("I am DEBUG 0")When I run script log_format_test.py it does print log as expect with 4th field incremented for each log entry (RUN 1):
ZZZZZZZZ|2022-02-24 11:41:19.578733|20527|1|log_format_test.py|I am INFO 0 ZZZZZZZZ|2022-02-24 11:41:19.578868|20527|2|log_format_test.py|I am INFO 1But when I try to move class ContextFilter out of log_format_test.py in to log_format.py by uncommenting # RUN 2 lines and commenting # RUN 1 lines, the log shows only initial value in 4th field which is 0 (RUN 2):
ZZZZZZZZ|2022-02-24 11:55:24.679430|29115|0|log_format_test.py|I am INFO 0 ZZZZZZZZ|2022-02-24 11:55:24.679552|29115|0|log_format_test.py|I am INFO 1Question: How can I move move class ContextFilter out of log_format_test.py in to log_format.py (or a new module of it's own)? What am I missing here?