Challenge 206 LK Perl Python Bash Java PHP

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diff --git a/challenge-206/lubos-kolouch/python/ch-1.py b/challenge-206/lubos-kolouch/python/ch-1.py
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+++ b/challenge-206/lubos-kolouch/python/ch-1.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import unittest
+
+
+def shortest_time_in_minutes(*times):
+    min_diff = 24 * 60  # maximum possible difference in minutes
+    for i in range(len(times) - 1):
+        for j in range(i + 1, len(times)):
+            h1, m1 = map(int, times[i].split(':'))
+            h2, m2 = map(int, times[j].split(':'))
+            diff = abs((h1 - h2) * 60 + (m1 - m2))
+            diff = 24 * 60 - diff if diff > 12 * 60 else diff  # account for circular time
+            min_diff = min(diff, min_diff)
+    return min_diff
+
+
+class TestShortestTimeInMinutes(unittest.TestCase):
+
+    def test_example1(self):
+        self.assertEqual(shortest_time_in_minutes("00:00", "23:55", "20:00"),
+                         5)
+
+    def test_example2(self):
+        self.assertEqual(shortest_time_in_minutes("01:01", "00:50", "00:57"),
+                         4)
+
+    def test_example3(self):
+        self.assertEqual(
+            shortest_time_in_minutes("10:10", "09:30", "09:00", "09:55"), 15)
+
+
+if __name__ == '__main__':
+    unittest.main()