primo commit

pricer/utils.py

@@ -0,0 +1,28 @@
+import math
+from typing import Iterable, List
+
+
+def round_to_multiple(value: float, multiple: float) -> float:
+    if multiple == 0:
+        return value
+    return round(value / multiple) * multiple
+
+
+def cumulative_sums(values: List[float]) -> List[float]:
+    if not values:
+        return []
+    results = [0.0] * len(values)
+    results[0] = values[0]
+    for i in range(1, len(values)):
+        results[i] = results[i - 1] + values[i]
+    return results
+
+
+def standard_deviation(values: Iterable[float]) -> float:
+    vals = list(values)
+    n = len(vals)
+    if n <= 1:
+        return 0.0
+    avg = sum(vals) / n
+    sum_sq = sum((v - avg) ** 2 for v in vals)
+    return math.sqrt(sum_sq / (n - 1))