ntnlog 0.4.0

Lightweight Python logger with timestamped file output, caller stack tracing, and working-directory-scoped file utilities

ntnlog

Lightweight Python logger with timestamped file output, caller stack tracing, and working-directory-scoped file utilities. Next-To-Nothing setup — just import and log.

Features

• Caller stack tracing: Automatically records where in your code a log came from
• Timestamped file output: Logs written to daily files with no configuration required
• File utilities: Safe, working-directory-scoped file operations with error handling
• Thread-safe: File writes are protected by a lock

Installation

pip install ntnlog

Quick Start

from ntnlog import Logger

log = Logger()

log("Application started")
log("Important message", print_to_console=True)
log("Debug info", print_to_console=True, console_message="DEBUG: Debug info")

# Enable detailed call-stack tracing
log.enable_log_tracing(True)
log("Traced message")

# Named loggers — useful when multiple instances log to the same file
app_logger = Logger(name="app")
worker_logger = Logger(name="worker")
# Output: [2026-05-13 15:46:34][app][main.py:12] message
#         [2026-05-13 15:46:34][worker][worker.py:8] message

# Custom log directory
log = Logger(log_dir="my_logs")

# Project-aware frame filtering
log = Logger(project_dir="/path/to/project")

Configuration

from ntnlog.ntn_config import GLOBAL_LOGGING_ENABLED, GLOBAL_LOG_TRACING_ENABLED

• GLOBAL_LOGGING_ENABLED: Master on/off switch for all loggers (default: True)
• GLOBAL_LOG_TRACING_ENABLED: Master on/off switch for tracing (default: True)

Per-instance controls:

log.enable_logging(False)      # disable this logger
log.enable_log_tracing(True)   # enable tracing for this logger

Modules

Logger (ntn_logging.py)

Main logging class. Writes timestamped entries to ./logs/<date>_logging.txt and optionally traces the full call stack to show exactly which file and line triggered the log.

File Utilities (ntn_file_utils.py)

Path and file verification scoped to the working directory:

• file_verify_path(base, directory) — confirms a directory exists within the working dir
• file_verify_file(base, filename, operator) — validates a file for read/write/execute

Utils (ntn_utils.py)

Working-directory-scoped path helpers with a clean exception-based API:

• ntnlog.utils.get_working_dir() — returns the current working directory
• ntnlog.utils.resolve_path(path, must_exist=False) — resolves a path within the working directory, raises ValueError if it escapes

Configuration (ntn_config.py)

Global flags controlling logging and tracing behaviour across all logger instances.

Development

pip install -e ".[dev]"
pytest
pytest -v
pytest tests/test_ntn_logging.py

License

MIT

Author

Nathan T Nguyen