Fix documentation (GH-13721)
Based on the source code https://github.com/python/cpython/blob/4a686504eb2bbf69adf78077458508a7ba131667/Lib/multiprocessing/pool.pyGH-L755 AsyncResult.successful() raises a ValueError, not an AssertionError.
(cherry picked from commit d4cf099dff4720a25208b5fa247dc16d86b11ac3)
Co-authored-by: Benjamin Yeh <bentyeh@users.noreply.github.com>
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index a4771d3..6c07124 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -2279,6 +2279,10 @@
Return whether the call completed without raising an exception. Will
raise :exc:`AssertionError` if the result is not ready.
+ .. versionchanged:: 3.7
+ If the result is not ready, :exc:`ValueError` is raised instead of
+ :exc:`AssertionError`.
+
The following example demonstrates the use of a pool::
from multiprocessing import Pool