Code for isogram in python.

Author: sbulage

exercises/isogram/example.py

@@ -0,0 +1,4 @@
+def isogram(string):
+    string = string.lower()
+    return len(set(string)) == len(string)
+

exercises/isogram/isogram_test.py

@@ -0,0 +1,20 @@
+import unittest
+from example import isogram
+
+
+class TestIsogram(unittest.TestCase):
+
+    def test_isogram(self):
+        tests = ['lumberjacks', 'background', 'downstream']
+        for test in tests:
+            string = isogram(test)
+            self.assertTrue(string, True)
+
+    def test_isogram_false(self):
+        tests = ['isograms', 'aba', '  ']
+        for test in tests:
+            string = isogram(test)
+            self.assertFalse(string, False)
+
+if __name__ == '__main__':
+    unittest.main()