log.py

import logging
from logging import handlers
import os
import random


def logger(logFile=None, setLevel="INFO", identity="", loggerName="elife-bot"):
    """
    Create a logger, by specifying a unique (or same) logFile,
    set the level of logging, and optional identity for what is
    sending logging message, to identify multiple workers
    """
    logger = logging.getLogger(loggerName)
    if logFile:
        hdlr = handlers.WatchedFileHandler(os.getcwd() + os.sep + logFile)
    else:
        # No log file provided, use the stream handler
        hdlr = logging.StreamHandler()
    formatter = logging.Formatter(
        "%(asctime)s %(levelname)s " + identity + " %(message)s", "%Y-%m-%dT%H:%M:%SZ"
    )
    hdlr.setFormatter(formatter)
    logger.addHandler(hdlr)
    logger.setLevel(eval("logging." + setLevel))
    return logger


def identity(process_name):
    return "%s_%s" % (process_name, int(random.random() * 1000))


def create_log(log_file, set_level, identity):
    "create a log file"
    return logger(log_file, set_level, identity)