mirror of https://github.com/python/cpython
Issue #23432: Remove duplicate content from SystemExit docs.
Also, document SystemExit.code attribute explicitly.
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@ -353,18 +353,17 @@ The following exceptions are the exceptions that are usually raised.
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.. exception:: SystemExit
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This exception is raised by the :func:`sys.exit` function. When it is not
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handled, the Python interpreter exits; no stack traceback is printed. If the
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associated value is an integer, it specifies the system exit status (passed
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to C's :c:func:`exit` function); if it is ``None``, the exit status is zero;
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if it has another type (such as a string), the object's value is printed and
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This exception is raised by the :func:`sys.exit` function. It inherits from
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:exc:`BaseException` instead of :exc:`Exception` so that it is not accidentally
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caught by code that catches :exc:`Exception`. This allows the exception to
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properly propagate up and cause the interpreter to exit. When it is not
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handled, the Python interpreter exits; no stack traceback is printed. The
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constructor accepts the same optional argument passed to :func:`sys.exit`.
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If the value is an integer, it specifies the system exit status (passed to
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C's :c:func:`exit` function); if it is ``None``, the exit status is zero; if
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it has another type (such as a string), the object's value is printed and
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the exit status is one.
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Instances have an attribute :attr:`!code` which is set to the proposed exit
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status or error message (defaulting to ``None``). Also, this exception derives
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directly from :exc:`BaseException` and not :exc:`Exception`, since it is not
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technically an error.
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A call to :func:`sys.exit` is translated into an exception so that clean-up
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handlers (:keyword:`finally` clauses of :keyword:`try` statements) can be
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executed, and so that a debugger can execute a script without running the risk
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@ -372,9 +371,10 @@ The following exceptions are the exceptions that are usually raised.
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absolutely positively necessary to exit immediately (for example, in the child
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process after a call to :func:`os.fork`).
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The exception inherits from :exc:`BaseException` instead of :exc:`Exception` so
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that it is not accidentally caught by code that catches :exc:`Exception`. This
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allows the exception to properly propagate up and cause the interpreter to exit.
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.. attribute:: code
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The exit status or error message that is passed to the constructor.
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(Defaults to ``None``.)
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.. exception:: TypeError
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