diff --git a/samila/functions.py b/samila/functions.py
index 312f432..b2d1abd 100644
--- a/samila/functions.py
+++ b/samila/functions.py
@@ -134,5 +134,5 @@ def is_same_data(data1, data2, precision=10**-5):
     :type precision: float
     :return: True if they are the same
     """
-    isSame = map(lambda x, y: abs(x - y) < precision, data1, data2)
-    return all(isSame)
+    is_same = map(lambda x, y: abs(x - y) < precision, data1, data2)
+    return all(is_same)