.. versionchanged:: 3.3
When one of the worker processes terminates abruptly, a
- :exc:`BrokenProcessPool` error is now raised. Previously, behaviour
+ :exc:`~concurrent.futures.process.BrokenProcessPool` error is now raised.
+ Previously, behaviour
was undefined but operations on the executor or its futures would often
freeze or deadlock.
*return_when* indicates when this function should return. It must be one of
the following constants:
- .. tabularcolumns:: |l|L|
-
- +-----------------------------+----------------------------------------+
- | Constant | Description |
- +=============================+========================================+
- | :const:`FIRST_COMPLETED` | The function will return when any |
- | | future finishes or is cancelled. |
- +-----------------------------+----------------------------------------+
- | :const:`FIRST_EXCEPTION` | The function will return when any |
- | | future finishes by raising an |
- | | exception. If no future raises an |
- | | exception then it is equivalent to |
- | | :const:`ALL_COMPLETED`. |
- +-----------------------------+----------------------------------------+
- | :const:`ALL_COMPLETED` | The function will return when all |
- | | futures finish or are cancelled. |
- +-----------------------------+----------------------------------------+
+ .. list-table::
+ :header-rows: 1
+
+ * - Constant
+ - Description
+
+ * - .. data:: FIRST_COMPLETED
+ - The function will return when any future finishes or is cancelled.
+
+ * - .. data:: FIRST_EXCEPTION
+ - The function will return when any future finishes by raising an
+ exception. If no future raises an exception
+ then it is equivalent to :const:`ALL_COMPLETED`.
+
+ * - .. data:: ALL_COMPLETED
+ - The function will return when all futures finish or are cancelled.
.. function:: as_completed(fs, timeout=None)
.. exception:: BrokenThreadPool
Derived from :exc:`~concurrent.futures.BrokenExecutor`, this exception
- class is raised when one of the workers of a :class:`ThreadPoolExecutor`
+ class is raised when one of the workers
+ of a :class:`~concurrent.futures.ThreadPoolExecutor`
has failed initializing.
.. versionadded:: 3.7
Derived from :exc:`~concurrent.futures.BrokenExecutor` (formerly
:exc:`RuntimeError`), this exception class is raised when one of the
- workers of a :class:`ProcessPoolExecutor` has terminated in a non-clean
+ workers of a :class:`~concurrent.futures.ProcessPoolExecutor`
+ has terminated in a non-clean
fashion (for example, if it was killed from the outside).
.. versionadded:: 3.3