This Python project is an exception formatter that produces readable stack traces.

It only supports Python 3.12 and later.

• Context displayed in addition to the trace line of each frame
• Reversed frame order i.e. JavaScript-like
• Truncated trace lines when there are too many
• Colorized stack trace obeying the the NO_COLOR environment variable
• Minimzed frames when those are not part of the user code
• Support for exception groups
• Highlighting of re-raises i.e. when an exception is caught and re-raised with more than a simple raise, causing two stack traces to be concatenated without separation
• Formatting of unraisable exceptions e.g. raised in a destructor
• Support for syntax errors

• Better checks e.g. when the column number is not available but the line number is
• Improve support for exception groups
• User vs lib tb kinds
• Avoid repeating recursive calls e.g. infinite loop
• Maximum screen width
• Option to reverse order
• Better highlight re-raises
• More ast nodes supported
• More precise ast node targeting e.g. should work if all statements are on the same line
• Handle multiprocessing.pool.RemoteTraceback which currently is text
• Better highlighting using ast data (e.g. only highlight first line of for loop)
• Formatting of exceptions raised in threads
• Better handling of file paths e.g. site-packages
• Perhaps syntax highlighting
• Avoid highlighting large nodes e.g. highlight a function and parentheses instead of the arguments if the function call is failing
• Other escape codes e.g. curly underlines or clickable file names
• Other characters

$ pip install dexc

import dexc
dexc.install()

• Pretty traceback
• Rich
• Stack printer