:mod:`traceback`
================

.. py:module:: traceback

.. autoapi-nested-parse::

   Traceback Module

   This module provides a standard interface to print stack traces of programs.
   This is useful when you want to print stack traces under program control.



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.. py:function:: format_exception(etype: Type[BaseException], value: BaseException, tb: types.TracebackType, limit: Optional[int] = None, chain: Optional[bool] = True) -> None

   Format a stack trace and the exception information.

   The arguments have the same meaning as the corresponding arguments
   to print_exception().  The return value is a list of strings, each
   ending in a newline and some containing internal newlines.  When
   these lines are concatenated and printed, exactly the same text is
   printed as does print_exception().

   .. note:: Setting ``chain`` will have no effect as chained exceptions are not yet implemented.

   :param Type[BaseException] etype: This is ignored and inferred from the type of ``value``.
   :param BaseException value: The exception. Must be an instance of `BaseException`.
   :param TracebackType tb: The traceback object. If `None`, the traceback will not be printed.
   :param int limit: Print up to limit stack trace entries (starting from the caller’s frame) if limit is positive.
                     Otherwise, print the last ``abs(limit)`` entries. If limit is omitted or None, all entries are printed.
   :param bool chain: If `True` then chained exceptions will be printed (note: not yet implemented).



.. py:function:: print_exception(etype: Type[BaseException], value: BaseException, tb: types.TracebackType, limit: Optional[int] = None, file: Optional[io.FileIO] = None, chain: Optional[bool] = True) -> None

   Prints exception information and stack trace entries.

   .. note:: Setting ``chain`` will have no effect as chained exceptions are not yet implemented.

   :param Type[BaseException] etype: This is ignored and inferred from the type of ``value``.
   :param BaseException value: The exception. Must be an instance of `BaseException`.
   :param TracebackType tb: The traceback object. If `None`, the traceback will not be printed.
   :param int limit: Print up to limit stack trace entries (starting from the caller’s frame) if limit is positive.
                     Otherwise, print the last ``abs(limit)`` entries. If limit is omitted or None, all entries are printed.
   :param io.FileIO file: If file is omitted or `None`, the output goes to `sys.stderr`; otherwise it should be an open
                          file or file-like object to receive the output.
   :param bool chain: If `True` then chained exceptions will be printed (note: not yet implemented).