Traceify 0.2.0

A lightweight, colorized Python terminal logger with auto exception capture and customizable format

Traceify

A lightweight, colorized Python terminal logger with auto exception capture, auto source-file detection, and a fully customizable log format.

Zero dependencies — uses only Python's standard library.

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Installation

pip install Traceify

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Quick Start

from Traceify import Traceify

log = Traceify("my_app")

log.debug("Starting up...")
log.info("Server running on port 8080")
log.warning("Memory usage above 80%")
log.error("Database connection failed")
log.critical("Disk full — shutting down!")

Output:

2026-04-13 11:00:00  [DEBUG   ]  [my_app]  Starting up...  @app.py
2026-04-13 11:00:00  [INFO    ]  [my_app]  Server running on port 8080  @app.py
2026-04-13 11:00:00  [WARNING ]  [my_app]  Memory usage above 80%  @app.py
2026-04-13 11:00:00  [ERROR   ]  [my_app]  Database connection failed  @app.py
2026-04-13 11:00:00  [CRITICAL]  [my_app]  Disk full — shutting down!  @app.py

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Features

✅ Auto Exception Capture

Call any log method inside an except block — the active exception is automatically appended. No extra code needed.

try:
    result = 10 / 0
except ZeroDivisionError:
    log.error("Math operation failed")
# Output: ... [ERROR   ]  [my_app]  Math operation failed  (ZeroDivisionError: division by zero)  @app.py

✅ Auto Source File Detection

Every log line automatically shows which file it came from — useful when logs from multiple files appear together.

2026-04-13 11:00:00  [INFO    ]  [api]  Request received  @routes.py
2026-04-13 11:00:00  [ERROR   ]  [db]   Query failed      @database.py

✅ Customizable Format

Choose exactly which fields to show and in what order using the fmt parameter.

Available fields: "timestamp", "level", "name", "message", "exception", "file"

# Only level, message, and source file
log = Traceify("app", fmt=["level", "message", "file"])
log.info("Compact output")
# → [INFO    ]  Compact output  @app.py

# Only timestamp and message
log = Traceify("app", fmt=["timestamp", "message"])
log.warning("Something happened")
# → 2026-04-13 11:00:00  Something happened

✅ Runtime Format & Level Changes

log.set_format(["level", "message", "file"])   # change format on the fly
log.set_level("WARNING")                        # suppress DEBUG and INFO

✅ Log Level Filtering

Set a minimum level — messages below it are silently suppressed.

log = Traceify("auth", level="WARNING")  # only WARNING / ERROR / CRITICAL shown
log.debug("This won't appear")
log.warning("This will appear")

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API Reference

Traceify(name, level, fmt)

Parameter	Type	Default	Description
name	str	"root"	Label shown in every log line
level	str	"DEBUG"	Minimum log level to display
fmt	list	all fields	Ordered list of fields to include

Logger methods

Method	Description
log.debug(msg)	Detailed diagnostic info
log.info(msg)	General operational events
log.warning(msg)	Unexpected but recoverable
log.error(msg)	A serious problem
log.critical(msg)	Fatal error
log.set_level(level)	Change minimum level at runtime
log.set_format(fmt)	Change field list at runtime

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License

MIT