diff --git a/squares.py b/squares.py
index 893e1db..68642b6 100644
--- a/squares.py
+++ b/squares.py
@@ -1,8 +1,10 @@
-"""Computation of weighted average of squares."""
+from argparse import ArgumentParser
+
+"""Computation of weighted average of squares. This is on the new branch"""
 
 
 def average_of_squares(list_of_numbers, list_of_weights=None):
-    """ Return the weighted average of a list of values.
+    """ Return the weighted average of squares of a list of values.
     
     By default, all values are equally weighted, but this can be changed
     by the list_of_weights argument.
@@ -29,7 +31,7 @@ def average_of_squares(list_of_numbers, list_of_weights=None):
         for number, weight
         in zip(list_of_numbers, effective_weights)
     ]
-    return sum(squares)
+    return sum(squares)/len(squares)
 
 
 def convert_numbers(list_of_strings):
@@ -38,7 +40,7 @@ def convert_numbers(list_of_strings):
     Example:
     --------
     >>> convert_numbers(["4", " 8 ", "15 16", " 23    42 "])
-    [4, 8, 15, 16]
+    [4.0, 8.0, 15.0, 16.0, 23.0, 42.0]
 
     """
     all_numbers = []
@@ -51,9 +53,22 @@ def convert_numbers(list_of_strings):
 
 
 if __name__ == "__main__":
-    numbers_strings = ["1","2","4"]
-    weight_strings = ["1","1","1"]        
+    parser = ArgumentParser(description="Provide list of numbers to square and weight")
+    parser.add_argument('--numbers', '-n', nargs='+', help="Space separated list of numbers", default=["1","2","4"])
+    parser.add_argument('--weights', '-w', nargs='+', help="Space separated ist of weights", default=["1","1","1"])
+    # parser.add_argument('numbers', help="String of space separated numbers")
+    # parser.add_argument('weights', help="String of space separated weights")
     
+    arguments = parser.parse_args()
+
+    # numbers_strings = ["1","2","4"]
+    numbers_strings = arguments.numbers
+    # weight_strings = ["1","1","1"]
+    weight_strings = arguments.weights
+
+    # numbers_strings = numbers_strings.split()
+    # weight_strings = weight_strings.split()
+
     numbers = convert_numbers(numbers_strings)
     weights = convert_numbers(weight_strings)