prep for Ray Summit, confirm on Ray 1.4

Author: ceteri

README.md

@@ -3,11 +3,15 @@
 An introductory tutorial about leveraging [Ray](https://docs.ray.io/)
 core features for distributed patterns.
 
-These examples have been tested using Python **3.6**, **3.7**, **3.8**
-in the following environments:
+These examples have been tested in the following environments:
 
   - Ubuntu 18.04 LTS
-  - macOS 10.13
+  - macOS 10.15
+
+Using:
+
+  - Ray versions 1.2, 1.3, 1.4 (not the early release candidates)
+  - Python versions: 3.6, 3.7, 3.8
 
 Currently, Python **3.9** is not supported by Ray.
 

ex_job_lib.ipynb

@@ -37,9 +37,7 @@
     "ray.init(\n",
     "    ignore_reinit_error=True,\n",
     "    logging_level=logging.ERROR,\n",
-    ")\n",
-    "\n",
-    "print(f\"Dashboard URL: http://{ray.get_dashboard_url()}\")"
+    ")"
    ]
   },
   {

ex_mult_pool.ipynb

@@ -36,9 +36,7 @@
     "ray.init(\n",
     "    ignore_reinit_error=True,\n",
     "    logging_level=logging.ERROR,\n",
-    ")\n",
-    "\n",
-    "print(f\"Dashboard URL: http://{ray.get_dashboard_url()}\")"
+    ")"
    ]
   },
   {

ex_para_iter.ipynb

@@ -42,9 +42,7 @@
     "ray.init(\n",
     "    ignore_reinit_error=True,\n",
     "    logging_level=logging.ERROR,\n",
-    ")\n",
-    "\n",
-    "print(f\"Dashboard URL: http://{ray.get_dashboard_url()}\")"
+    ")"
    ]
   },
   {

ex_remo_func.ipynb

@@ -39,9 +39,7 @@
     "ray.init(\n",
     "    ignore_reinit_error=True,\n",
     "    logging_level=logging.ERROR,\n",
-    ")\n",
-    "\n",
-    "print(f\"Dashboard URL: http://{ray.get_dashboard_url()}\")"
+    ")"
    ]
   },
   {

ex_remo_meth.ipynb

@@ -39,9 +39,7 @@
     "ray.init(\n",
     "    ignore_reinit_error=True,\n",
     "    logging_level=logging.ERROR,\n",
-    ")\n",
-    "\n",
-    "print(f\"Dashboard URL: http://{ray.get_dashboard_url()}\")"
+    ")"
    ]
   },
   {

ex_remo_objs.ipynb

@@ -39,9 +39,7 @@
     "ray.init(\n",
     "    ignore_reinit_error=True,\n",
     "    logging_level=logging.ERROR,\n",
-    ")\n",
-    "\n",
-    "print(f\"Dashboard URL: http://{ray.get_dashboard_url()}\")"
+    ")"
    ]
   },
   {
@@ -104,7 +102,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "You can also access the values of multiple object references in parallel:"
+    "For example, you can access the values of multiple object references in parallel:"
    ]
   },
   {
@@ -146,7 +144,7 @@
     "obj_ref = long_running_function.remote()\n",
     "\n",
     "try:\n",
-    "    ray.get(obj_ref, timeout=4)\n",
+    "    ray.get(obj_ref, timeout=6)\n",
     "except GetTimeoutError:\n",
     "    print(\"`get` timed out\")"
    ]