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import os |
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import sys |
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import logging |
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import functools |
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logger_initialized = {} |
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@functools.lru_cache() |
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def get_logger(name="openrec", log_file=None, log_level=logging.DEBUG): |
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"""Initialize and get a logger by name. |
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If the logger has not been initialized, this method will initialize the |
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logger by adding one or two handlers, otherwise the initialized logger will |
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be directly returned. During initialization, a StreamHandler will always be |
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added. If `log_file` is specified a FileHandler will also be added. |
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Args: |
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name (str): Logger name. |
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log_file (str | None): The log filename. If specified, a FileHandler |
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will be added to the logger. |
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log_level (int): The logger level. Note that only the process of |
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rank 0 is affected, and other processes will set the level to |
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"Error" thus be silent most of the time. |
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Returns: |
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logging.Logger: The expected 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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for logger_name in logger_initialized: |
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if name.startswith(logger_name): |
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return logger |
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formatter = logging.Formatter( |
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"[%(asctime)s] %(name)s %(levelname)s: %(message)s", |
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datefmt="%Y/%m/%d %H:%M:%S") |
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stream_handler = logging.StreamHandler(stream=sys.stdout) |
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stream_handler.setFormatter(formatter) |
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logger.addHandler(stream_handler) |
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rank = int(os.environ["LOCAL_RANK"]) if "LOCAL_RANK" in os.environ else 0 |
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if log_file is not None and rank == 0: |
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log_file_folder = os.path.split(log_file)[0] |
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os.makedirs(log_file_folder, exist_ok=True) |
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file_handler = logging.FileHandler(log_file, "a") |
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file_handler.setFormatter(formatter) |
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logger.addHandler(file_handler) |
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if rank == 0: |
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logger.setLevel(log_level) |
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else: |
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logger.setLevel(logging.ERROR) |
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logger_initialized[name] = True |
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logger.propagate = False |
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return logger |
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