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| -rw-r--r-- | Doc/reference/simple_stmts.rst | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/Doc/reference/simple_stmts.rst b/Doc/reference/simple_stmts.rst index 3fff848..941b342 100644 --- a/Doc/reference/simple_stmts.rst +++ b/Doc/reference/simple_stmts.rst @@ -591,10 +591,13 @@ instance, with its traceback set to its argument), like so:: __context__ (exception attribute) The ``from`` clause is used for exception chaining: if given, the second -*expression* must be another exception class or instance, which will then be -attached to the raised exception as the :attr:`__cause__` attribute (which is -writable). If the raised exception is not handled, both exceptions will be -printed:: +*expression* must be another exception class or instance. If the second +expression is an exception instance, it will be attached to the raised +exception as the :attr:`__cause__` attribute (which is writable). If the +expression is an exception class, the class will be instantiated and the +resulting exception instance will be attached to the raised exception as the +:attr:`__cause__` attribute. If the raised exception is not handled, both +exceptions will be printed:: >>> try: ... print(1 / 0) |