diff --git a/gradefetcher/gradefetcher.py b/gradefetcher/gradefetcher.py
index 71a92fa..e4aeb39 100644
--- a/gradefetcher/gradefetcher.py
+++ b/gradefetcher/gradefetcher.py
@@ -22,6 +22,7 @@
 
 
 def grade_from_list(grades):
+    """take a list of integers and calculate grade from them"""
     if len(grades) > 1:
         total_grade = sum(grades)
         grade = int(truediv(total_grade * 100, len(grades)))