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logger.py
---------
Logging setup for training and evaluation runs.
"""
import logging
import sys
from pathlib import Path
from typing import Optional
def setup_logger(
name: str,
log_file: Optional[str] = None,
level: int = logging.INFO,
) -> logging.Logger:
"""
Create and configure a logger.
Args:
name: logger name
log_file: optional path to write logs to file
level: logging level
Returns:
Configured logger
"""
logger = logging.getLogger(name)
logger.setLevel(level)
# Avoid duplicate handlers
if logger.handlers:
return logger
formatter = logging.Formatter(
fmt = "[%(asctime)s] [%(name)s] [%(levelname)s] %(message)s",
datefmt = "%Y-%m-%d %H:%M:%S",
)
# Console handler
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setLevel(level)
console_handler.setFormatter(formatter)
logger.addHandler(console_handler)
# File handler (optional)
if log_file is not None:
Path(log_file).parent.mkdir(parents=True, exist_ok=True)
file_handler = logging.FileHandler(log_file)
file_handler.setLevel(level)
file_handler.setFormatter(formatter)
logger.addHandler(file_handler)
return logger
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