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Fix showing SystemExit exception raise inside except handler (#14503)...
Fix showing SystemExit exception raise inside except handler (#14503) Doing something like this: ```python try: 5 / 0 except Exception as e: raise SystemExit ``` was hitting an error inside UltraTB, creating a long traceback of its internals (which, ironically, UltraTB itself then displays correctly :-). `ListTB.get_exception_only()` calls the `ListTB.structured_traceback()` method *specifically* - even if `self` is a subclass, it won't use the subclass's method. However, the exception chaining in that method uses recursion by calling `self.structured_traceback()`, which will use a subclass's method. Tuples were added as an option there to support exception chaining, but not all of the machinery in connected classes expects a tuple. This just skips the exception chaining logic for the `etb=None` case, when we're showing the exception only. I'm not sure this is necessarily the best fix, but I didn't want to spend too much time following code around a module that's old enough to vote. Closes #12104

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error.py
60 lines | 1.7 KiB | text/x-python | PythonLexer
# encoding: utf-8
"""
Global exception classes for IPython.core.
Authors:
* Brian Granger
* Fernando Perez
* Min Ragan-Kelley
Notes
-----
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2008 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Exception classes
#-----------------------------------------------------------------------------
class IPythonCoreError(Exception):
pass
class TryNext(IPythonCoreError):
"""Try next hook exception.
Raise this in your hook function to indicate that the next hook handler
should be used to handle the operation.
"""
class UsageError(IPythonCoreError):
"""Error in magic function arguments, etc.
Something that probably won't warrant a full traceback, but should
nevertheless interrupt a macro / batch file.
"""
class StdinNotImplementedError(IPythonCoreError, NotImplementedError):
"""raw_input was requested in a context where it is not supported
For use in IPython kernels, where only some frontends may support
stdin requests.
"""
class InputRejected(Exception):
"""Input rejected by ast transformer.
Raise this in your NodeTransformer to indicate that InteractiveShell should
not execute the supplied input.
"""