From e869e0d33d5a25790150ce5145a5a23015353847 Mon Sep 17 00:00:00 2001
From: enstenr <enstenr@gmail.com>
Date: Mon, 24 Nov 2025 18:32:11 +0000
Subject: [PATCH]  Added example for bag groupby and foldby as requested in
 issue 46

---
 bag.ipynb | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/bag.ipynb b/bag.ipynb
index 663baf4b..b3717af7 100644
--- a/bag.ipynb
+++ b/bag.ipynb
@@ -138,6 +138,25 @@
     "b.count().compute()  # Count total number of records"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "(b.groupby(lambda record:record[\"occupation\"]).map(lambda kv: ( kv[0], len(kv[1]))).compute()[:10]) # using groupby to count people in each occupation"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "city_counts = b.foldby(key = lambda record:record[\"address\"][\"city\"], binop = lambda acc, record:acc + 1, initial = 0 ) # using foldby to count people living by city\n",
+    "city_counts.take(10)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},