Latest Contributions by DonMorrison1

Over the years, I have created a logger component that I copy into each of my python projects and it has worked quite well for me. It is built on top of the standard Python logging support.  "info" messages go to both the console and a log file. "debug" messages go only to the log file.  It also deletes old log files.   The logger is created with this code in logger.py (you can see how you can control which subfolder that logs are stored in and the prefix for the log file name, and the retention time for old log files). I use iPython for debugging so you could ignore/remove that code if it isn't applicable. import os import sys import arcpy import time import glob import logging import logging.handlers LOG_FILE = os.path.join(arcpy.env.scratchFolder, 'logs', 'fs', 'fs_log_%i.txt' % os.getpid()) # Log handler that forwards messages to ArcGIS class ArcGisHandler(logging.Handler): try: get_ipython() is_run_from_ipython = True except NameError: is_run_from_ipython = False is_run_from_cmd_line = sys.stdin is not None and sys.stdin.isatty() def emit(self, record): if not self.is_run_from_cmd_line and not self.is_run_from_ipython: arcpy.AddMessage(self.format(record)) # Set up logging def get(log_name): # Compute the full path for this process and make sure the directory exists if not os.path.exists(os.path.dirname(LOG_FILE)): os.makedirs(os.path.dirname(LOG_FILE)) # Clean up old log files if not os.path.exists(LOG_FILE): for file in glob.glob(os.path.join(arcpy.env.scratchFolder, 'logs', 'fs', 'fs_log_*.txt')): if time.time() - os.path.getmtime(file) > 2 * 60 * 60 * 24: try: os.remove(file) except: pass logger = logging.getLogger(log_name) logger.disabled = False logger.setLevel(logging.DEBUG) if len(logger.handlers) == 0: # File handler for detailed tracing try: formatter1 = logging.Formatter('%(asctime)s - %(levelname)s - %(module)s - %(message)s') fh1 = logging.FileHandler(LOG_FILE) fh1.setFormatter(formatter1) fh1.setLevel(logging.DEBUG) logger.addHandler(fh1) except: pass # Standard out handler try: formatter2 = logging.Formatter('%(levelname)s - %(message)s') fh2 = logging.StreamHandler(sys.stdout) fh2.setFormatter(formatter2) fh2.setLevel(logging.INFO) logger.addHandler(fh2) except: pass # Custom handler to send messages to ArcGIS try: if sys.version_info.major > 2: formatter4 = logging.Formatter('%(asctime)s - %(message)s', '%H:%M:%S') fh4 = ArcGisHandler() fh4.setFormatter(formatter4) fh4.setLevel(logging.INFO) logger.addHandler(fh4) except: pass return logger   In every module I include these two lines: import logger my_logger = logger.get('fs_log')   At my main entry point I spit out where the log file is: my_logger.info ("Logging to %s" % logger.LOG_FILE)     ... View more