Fix/ exercises

Author: AfiMaameDufie

python/100_aggregation_pipeline_match.ipynb

@@ -72,7 +72,8 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Exercise: get all books from 2010 or 2012"
+    "### Exercise: get all books from 2010 or 2012 and with less than 200 pages\n",
+    "Use { $and: [ {field: value1}, {field: value2} ] } to express field == value1 AND field == value2 Hint: use Less Than {field: {$lt: value}}"
    ]
   },
   {
@@ -83,17 +84,44 @@
    "source": [
     "books_from_2010_and_2012 = [\n",
     "    {\n",
-    "        \"$match\": { \"year\": { \"$in\": [2010, 2012] } }\n",
-    "    },\n",
+    "        \"$match\": {\n",
+    "            # add code here!\n",
+    "        }  \n",
+    "    }\n",
+    "]\n",
+    "\n",
+    "cursor = books.aggregate(books_from_2010_and_2012)\n",
+    "\n",
+    "for f in cursor:\n",
+    "    print(f)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Exercise: get all books from 2010 or all books with less than 50 pages\n",
+    "Use { $or: [ {field: value1}, {field: value2} ] } to express field == value1 OR field == value2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "books_from_2010_or_2012 = [\n",
     "    {\n",
-    "        \"$limit\": 10\n",
+    "        \"$match\": {\n",
+    "            # add code here!\n",
+    "        }  \n",
     "    }\n",
     "]\n",
     "\n",
-    "cursor = books.aggregate(pipeline)\n",
+    "cursor = books.aggregate(books_from_2010_or_2012)\n",
     "\n",
     "for f in cursor:\n",
-    "    print(f\"{f}.\")"
+    "    print(f)"
    ]
   },
   {