Code for isogram in python.

An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter.

Examples of isograms:

    -lumberjacks
    -background
    -downstream
The word isograms, however, is not an isogram, because the s repeats.

Signed-off-by: Satyajit Bulage <[email protected]>

Author: sbulage

exercises/isogram/example.py

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+def isogram(string):
+    string = string.lower()
+    return len(set(string)) == len(string)

exercises/isogram/isogram_test.py

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+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()