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traceback ⚬⃕ᵖʸ｜Documentation｜1st｜20251021185259-00-⌔

traceback — Print or retrieve a stack traceback — Python 3 documentation

traceback — Print or retrieve a stack traceback

Source code: Lib/traceback.py

This module provides a standard interface to extract, format and print stack traces of Python programs. It is more flexible than the interpreter’s default traceback display, and therefore makes it possible to configure certain aspects of the output. Finally, it contains a utility for capturing enough information about an exception to print it later, without the need to save a reference to the actual exception. Since exceptions can be the roots of large objects graph, this utility can significantly improve memory management.

The module uses traceback objects — these are objects of type types.TracebackType, which are assigned to the __traceback__ field of BaseException instances.

See also:
Module faulthandler

Used to dump Python tracebacks explicitly, on a fault, after a timeout, or on a user signal.

Module pdb

Interactive source code debugger for Python programs.

The module’s API can be divided into two parts:

  • Module-level functions offering basic functionality, which are useful for interactive inspection of exceptions and tracebacks.
  • TracebackException class and its helper classes StackSummary and FrameSummary. These offer both more flexibility in the output generated and the ability to store the information necessary for later formatting without holding references to actual exception and traceback objects.

Added in version 3.13: Output is colorized by default and can be controlled using environment variables.

Printed 2026-06-28.

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