diff options
Diffstat (limited to 'Doc/reference')
| -rw-r--r-- | Doc/reference/datamodel.rst | 3 | ||||
| -rw-r--r-- | Doc/reference/expressions.rst | 17 |
2 files changed, 17 insertions, 3 deletions
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index 84320f4..033d65f 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -2854,7 +2854,8 @@ generators, coroutines do not directly support iteration. :exc:`StopIteration`, or other exception) is the same as when iterating over the :meth:`__await__` return value, described above. -.. method:: coroutine.throw(type[, value[, traceback]]) +.. method:: coroutine.throw(value) + coroutine.throw(type[, value[, traceback]]) Raises the specified exception in the coroutine. This method delegates to the :meth:`~generator.throw` method of the iterator that caused diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst index 4ffb651..502c022 100644 --- a/Doc/reference/expressions.rst +++ b/Doc/reference/expressions.rst @@ -557,14 +557,27 @@ is already executing raises a :exc:`ValueError` exception. could receive the value. -.. method:: generator.throw(type[, value[, traceback]]) +.. method:: generator.throw(value) + generator.throw(type[, value[, traceback]]) - Raises an exception of type ``type`` at the point where the generator was paused, + Raises an exception at the point where the generator was paused, and returns the next value yielded by the generator function. If the generator exits without yielding another value, a :exc:`StopIteration` exception is raised. If the generator function does not catch the passed-in exception, or raises a different exception, then that exception propagates to the caller. + In typical use, this is called with a single exception instance similar to the + way the :keyword:`raise` keyword is used. + + For backwards compatability, however, the second signature is + supported, following a convention from older versions of Python. + The *type* argument should be an exception class, and *value* + should be an exception instance. If the *value* is not provided, the + *type* constructor is called to get an instance. If *traceback* + is provided, it is set on the exception, otherwise any existing + :attr:`~BaseException.__traceback__` attribute stored in *value* may + be cleared. + .. index:: exception: GeneratorExit |