add average

Author: realDuYuanChao

maths/average.py

@@ -0,0 +1,25 @@
+"""
+https://en.wikipedia.org/wiki/Average
+"""
+
+
+def average(numbers):
+    """
+    Calculate average of a list numbers.
+    :param numbers: the number to be calculated.
+    :return: average of a list number.
+
+    >>> average([1, 2, 2, 3, 4, 7, 9])
+    4.0
+    >>> average(range(1, 11))
+    5.5
+    >>> average(range(1, 101))
+    50.5
+    """
+    return sum(numbers) / len(numbers)
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()