Merge pull request #127 from ikostan/exercism-sync/3f7821b20107417c

[Sync Iteration] python/perfect-numbers/1

Author: ikostan

solutions/python/perfect-numbers/1/perfect_numbers.py

@@ -0,0 +1,26 @@
+"""
+Determine if a number is perfect, abundant, or deficient based on
+Nicomachus' (60 - 120 CE) classification scheme for positive integers.
+"""
+
+
+def classify(number: int) -> str:
+    """
+    A perfect number equals the sum of its positive divisors.
+
+    :param number: int a positive integer
+    :return: str the classification of the input integer
+    """
+    if number < 1:
+        raise ValueError(
+            "Classification is only possible for positive integers."
+        )
+
+    total_divisors: int = sum(i for i in range(1, number) if number % i == 0)
+
+    if total_divisors == number:
+        return "perfect"
+    if number < total_divisors:
+        return "abundant"
+
+    return "deficient"