90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
import datetime
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import logging
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import os
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import sys
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import termcolor
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__all__ = ['setup_logger']
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logger_initialized = []
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def setup_logger(name, output=None):
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"""
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Initialize logger and set its verbosity level to INFO.
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Args:
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output (str): a file name or a directory to save log. If None, will not save log file.
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If ends with ".txt" or ".log", assumed to be a file name.
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Otherwise, logs will be saved to `output/log.txt`.
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name (str): the root module name of this logger
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Returns:
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logging.Logger: a logger
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"""
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logger = logging.getLogger(name)
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if name in logger_initialized:
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return logger
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logger.setLevel(logging.INFO)
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logger.propagate = False
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formatter = ("[%(asctime2)s %(levelname2)s] %(module2)s:%(funcName2)s:%(lineno2)s - %(message2)s")
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color_formatter = ColoredFormatter(formatter, datefmt="%m/%d %H:%M:%S")
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ch = logging.StreamHandler(stream=sys.stdout)
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ch.setLevel(logging.DEBUG)
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ch.setFormatter(color_formatter)
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logger.addHandler(ch)
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# file logging: all workers
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if output is not None:
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if output.endswith(".txt") or output.endswith(".log"):
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filename = output
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else:
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filename = os.path.join(output, "log.txt")
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os.makedirs(os.path.dirname(filename))
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fh = logging.FileHandler(filename, mode='a')
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fh.setLevel(logging.DEBUG)
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fh.setFormatter(logging.Formatter())
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logger.addHandler(fh)
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logger_initialized.append(name)
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return logger
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COLORS = {
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"WARNING": "yellow",
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"INFO": "white",
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"DEBUG": "blue",
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"CRITICAL": "red",
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"ERROR": "red",
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}
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class ColoredFormatter(logging.Formatter):
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def __init__(self, fmt, datefmt, use_color=True):
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logging.Formatter.__init__(self, fmt, datefmt=datefmt)
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self.use_color = use_color
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def format(self, record):
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levelname = record.levelname
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if self.use_color and levelname in COLORS:
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def colored(text):
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return termcolor.colored(
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text,
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color=COLORS[levelname],
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attrs={"bold": True},
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)
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record.levelname2 = colored("{:<7}".format(record.levelname))
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record.message2 = colored(record.msg)
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asctime2 = datetime.datetime.fromtimestamp(record.created)
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record.asctime2 = termcolor.colored(asctime2, color="green")
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record.module2 = termcolor.colored(record.module, color="cyan")
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record.funcName2 = termcolor.colored(record.funcName, color="cyan")
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record.lineno2 = termcolor.colored(record.lineno, color="cyan")
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return logging.Formatter.format(self, record)
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