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Logging Utilities
=================
Structured logging for experiments.
Author: UW MSIM Team
Date: November 2025
"""
import logging
import sys
from pathlib import Path
def setup_logger(
name: str,
log_file: str = None,
level: int = logging.INFO,
format_string: str = None
) -> logging.Logger:
"""
Setup logger with file and console handlers.
Parameters
----------
name : str
Logger name
log_file : str, optional
Log file path
level : int
Logging level
format_string : str, optional
Custom format string
Returns
-------
logger : logging.Logger
Configured logger
"""
if format_string is None:
format_string = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
# Create logger
logger = logging.getLogger(name)
logger.setLevel(level)
logger.handlers = [] # Clear existing handlers
# Console handler
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setLevel(level)
console_handler.setFormatter(logging.Formatter(format_string))
logger.addHandler(console_handler)
# File handler (if specified)
if log_file:
Path(log_file).parent.mkdir(parents=True, exist_ok=True)
file_handler = logging.FileHandler(log_file)
file_handler.setLevel(level)
file_handler.setFormatter(logging.Formatter(format_string))
logger.addHandler(file_handler)
return logger
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