RAG_BOT/logger.py

# /home/bk_anupam/code/LLM_agents/RAG_BOT/logger.py
import logging
import os
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()

# Get log level from environment variable, default to INFO
log_level_name = os.getenv('LOG_LEVEL', 'INFO').upper()

# Map string level name to logging level constant
log_level = logging.getLevelName(log_level_name)

# Validate if the level name was valid, otherwise default to INFO
if not isinstance(log_level, int):
    print(f"Warning: Invalid LOG_LEVEL '{log_level_name}'. Defaulting to INFO.")
    log_level = logging.INFO

# Configure logging
logging.basicConfig(
    level=log_level, # Use the determined level
    # Add %(module)s, %(funcName)s, and %(lineno)d to the format string
    format='%(asctime)s - %(name)s - [%(module)s.%(funcName)s:%(lineno)d] - %(levelname)s - %(message)s'
    # Example Breakdown:
    # %(asctime)s: Time of log creation
    # %(name)s: Name of the logger (often the module name if using getLogger(__name__))
    # %(module)s: Module filename (without extension)
    # %(funcName)s: Name of the function/method containing the logging call
    # %(lineno)d: Line number where the logging call occurs
    # %(levelname)s: Text logging level ('INFO', 'WARNING', etc.)
    # %(message)s: The logged message itself
)
logger = logging.getLogger(__name__)

# Optional: Log the effective level being used
logger.info(f"Logging configured with level: {logging.getLevelName(log_level)}")