revert spawn commit

Author: jph00

fastcore/parallel.py

@@ -106,7 +106,7 @@ def parallel(f, items, *args, n_workers=defaults.cpus, total=None, progress=None
     kwpool = {}
     if threadpool: pool = ThreadPoolExecutor
     else:
-        if not method and sys.platform == 'darwin' and not IN_NOTEBOOK: method='spawn'
+        if not method and sys.platform == 'darwin': method='fork'
         if method: kwpool['mp_context'] = get_context(method)
         pool = ProcessPoolExecutor
     with pool(n_workers, pause=pause, **kwpool) as ex:

nbs/03a_parallel.ipynb

@@ -312,7 +312,7 @@
     "    kwpool = {}\n",
     "    if threadpool: pool = ThreadPoolExecutor\n",
     "    else:\n",
-    "        if not method and sys.platform == 'darwin' and not IN_NOTEBOOK: method='spawn'\n",
+    "        if not method and sys.platform == 'darwin': method='fork'\n",
     "        if method: kwpool['mp_context'] = get_context(method)\n",
     "        pool = ProcessPoolExecutor\n",
     "    with pool(n_workers, pause=pause, **kwpool) as ex:\n",