feat(challenge-200/lubos-kolouch/): Challenge 200 LK Perl Python Blog

1 files changed, 36 insertions, 0 deletions

diff --git a/challenge-200/lubos-kolouch/python/ch-1.py b/challenge-200/lubos-kolouch/python/ch-1.py
new file mode 100644
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+++ b/challenge-200/lubos-kolouch/python/ch-1.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import unittest
+
+
+def arithmetic_slices(lst):
+    if len(lst) < 3:
+        return []
+
+    slices = []
+    for i in range(len(lst) - 2):
+        if lst[i + 1] - lst[i] == lst[i + 2] - lst[i + 1]:
+            diff = lst[i + 1] - lst[i]
+            slice = [lst[i], lst[i + 1], lst[i + 2]]
+            slices.append(slice[:])
+            for j in range(i + 3, len(lst)):
+                if lst[j] - lst[j - 1] == diff:
+                    slice.append(lst[j])
+                    slices.append(slice[:])
+                else:
+                    break
+
+    return slices
+
+
+class TestArithmeticSlices(unittest.TestCase):
+
+    def test_cases(self):
+        self.assertEqual(arithmetic_slices([1, 2, 3, 4]),
+                         [[1, 2, 3], [1, 2, 3, 4], [2, 3, 4]], 'Test Case 1')
+        self.assertEqual(arithmetic_slices([2]), [], 'Test Case 2')
+
+
+if __name__ == '__main__':
+    unittest.main()