diff --git a/Week02/weighted_kayra_basar_karadeniz.py b/Week02/weighted_kayra_basar_karadeniz.py
new file mode 100644
index 00000000..e501f7a7
--- /dev/null
+++ b/Week02/weighted_kayra_basar_karadeniz.py
@@ -0,0 +1,10 @@
+import random
+def weighted_srs(data, n, weights, with_replacement=False):
+    if with_replacement:
+        return random.choices(data, weights=weights, k=n)
+    res, d_copy, w_copy = [], list(data), list(weights) if weights else [1]*len(data)
+    for _ in range(n):
+        idx = random.choices(range(len(d_copy)), weights=w_copy)[0]
+        res.append(d_copy.pop(idx))
+        w_copy.pop(idx)
+    return res