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authorGeorg Brandl <georg@python.org>2009-12-29 21:38:35 (GMT)
committerGeorg Brandl <georg@python.org>2009-12-29 21:38:35 (GMT)
commitfbd1b2203deecbeef7be5b8e2e1221af1964f106 (patch)
treed8e536a7e5ca672b1622189f70d2c7733ebaa3d9 /Doc
parente82ac51cd6b09a5dfb3803a0cd21c7ea95ac0e15 (diff)
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#7590: exception classes no longer are in the "exceptions" module. Also clean up text that was written with string exceptions in mind.
Diffstat (limited to 'Doc')
-rw-r--r--Doc/library/exceptions.rst18
1 files changed, 5 insertions, 13 deletions
diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst
index 17a0fed..03e71c4 100644
--- a/Doc/library/exceptions.rst
+++ b/Doc/library/exceptions.rst
@@ -3,20 +3,12 @@
Built-in Exceptions
===================
-.. module:: exceptions
- :synopsis: Standard exception classes.
-
-
-Exceptions should be class objects. The exceptions are defined in the module
-:mod:`exceptions`. This module never needs to be imported explicitly: the
-exceptions are provided in the built-in namespace as well as the
-:mod:`exceptions` module.
-
.. index::
statement: try
statement: except
-For class exceptions, in a :keyword:`try` statement with an :keyword:`except`
+In Python, all exceptions must be instances of a class that derives from
+:class:`BaseException`. In a :keyword:`try` statement with an :keyword:`except`
clause that mentions a particular class, that clause also handles any exception
classes derived from that class (but not exception classes from which *it* is
derived). Two exception classes that are not related via subclassing are never
@@ -44,7 +36,7 @@ programmers are encouraged to at least derive new exceptions from the
defining exceptions is available in the Python Tutorial under
:ref:`tut-userexceptions`.
-The following exceptions are only used as base classes for other exceptions.
+The following exceptions are used mostly as base classes for other exceptions.
.. XXX document with_traceback()
@@ -99,8 +91,8 @@ The following exceptions are only used as base classes for other exceptions.
In this last case, :attr:`args` contains the verbatim constructor arguments as a
tuple.
-The following exceptions are the exceptions that are actually raised.
+The following exceptions are the exceptions that are usually raised.
.. exception:: AssertionError
@@ -369,10 +361,10 @@ The following exceptions are the exceptions that are actually raised.
associated value is a string indicating the type of the operands and the
operation.
+
The following exceptions are used as warning categories; see the :mod:`warnings`
module for more information.
-
.. exception:: Warning
Base class for warning categories.