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diff --git a/challenge-245/packy-anderson/python/ch-1.py b/challenge-245/packy-anderson/python/ch-1.py
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+++ b/challenge-245/packy-anderson/python/ch-1.py
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+#!/usr/bin/env python
+
+def sortLanguage(lang, popularity):
+    # build a dict associating popularity with lang
+    lang_pop = {
+        v: popularity[i] for i,v in enumerate(lang)
+    }
+    sorted_list = sorted(lang,
+                         # sort by lang_pop, not lang
+                         key=lambda x: (lang_pop[x]))
+    return sorted_list
+
+def comma_join(arr):
+    return ', '.join(map(lambda i: str(i), arr))
+
+def quoted_comma_join(arr):
+    return "'" + "', '".join(arr) + "'"
+
+def solution(lang, popularity):
+    print(f'Input: @lang = ({quoted_comma_join(lang)})')
+    print(f'       @popularity = ({comma_join(popularity)})')
+    output = sortLanguage(lang, popularity)
+    print(f'Output: ({quoted_comma_join(output)})')
+
+print('Example 1:')
+solution(['perl', 'c', 'python'], [2, 1, 3])
+
+print('\nExample 2:')
+solution(['c++', 'haskell', 'java'], [1, 3, 2])