STINNER Victor <vstinner@redhat.com> added the comment: multiprocessing should help the developer to detect when the API is misused. For example, emit a ResourceWarning if a pool is not released explicitly. It might help to detect such bugs: * bpo-33676 * bpo-35413 ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue34172> _______________________________________