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| import logging | |
| import logging.handlers | |
| import os.path as path | |
| LOG_FORMAT = '[%(asctime)s] %(levelname)s %(message)s' | |
| TIME_FORMAT = '%Y-%m-%d %H:%M:%S' | |
| LOG_DEFAULT_LEVEL = logging.DEBUG | |
| def get_formatter(): | |
| try: | |
| from colorlog import ColoredFormatter | |
| formatter = ColoredFormatter( | |
| '%(white)s[%(asctime)s]%(reset)s %(log_color)s%(levelname)-6s%(reset)s %(message)s', | |
| datefmt=TIME_FORMAT, | |
| reset=True, | |
| log_colors={ | |
| 'DEBUG': 'cyan', | |
| 'INFO': 'green', | |
| 'WARNING': 'yellow', | |
| 'ERROR': 'red', | |
| 'CRITICAL': 'red,bg_white', | |
| }, | |
| style='%' | |
| ) | |
| except ImportError: | |
| formatter = logging.Formatter(LOG_FORMAT, TIME_FORMAT) | |
| return formatter | |
| def get_stream_handler(): | |
| try: | |
| import colorlog | |
| handler = colorlog.StreamHandler() | |
| except ImportError: | |
| handler = logging.StreamHandler() | |
| handler.setFormatter(get_formatter()) | |
| return handler | |
| def add_file_handler(logger, filename, level): | |
| file_handler = logging.handlers.RotatingFileHandler(filename, mode='a', maxBytes=10**8, backupCount=1) | |
| file_handler.setLevel(level) | |
| file_handler.setFormatter(get_formatter()) | |
| logger.addHandler(file_handler) | |
| def configure_logger(logger_name='root', log_dir='/tmp/', silent=True, level=LOG_DEFAULT_LEVEL): | |
| """ | |
| Returns logger which output to stdout and and to specified file. | |
| Example: logger = configure_logger('just_log') | |
| will output log with timestamps to /var/local/log/just_log.log | |
| """ | |
| filename = logger_name + '.log' | |
| log_location = path.join(log_dir, filename) | |
| logger = logging.getLogger(logger_name) | |
| logger.setLevel(level) | |
| logger.handlers = [] | |
| # Stdout | |
| stdout = get_stream_handler() | |
| stdout.setLevel(level) | |
| logger.addHandler(stdout) | |
| # Filehandler | |
| add_file_handler(logger, log_location, level) | |
| if not silent: | |
| print('Log to file {}'.format(log_location)) | |
| logger.propagate = False | |
| return logger |
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