2 permutations check

Author: nickolasteixeira

Python/chapter01/1.1 - Is Unique/Nick2.py

@@ -0,0 +1,65 @@
+#!/usr/bin/python3
+'''
+Module that Given two strings, write a method to decide if one is a permutation of the
+other. 
+
+'''
+
+import unittest
+
+def permutation(string1, string2):
+    '''
+    Checks two strings if one is a permutation of the other
+    Args:
+        string1 (str): a string
+        string2 (str): another string
+    '''
+    if len(string1) is not len(string2):
+        return False
+
+    n1, n2 = sorted(string1), sorted(string2)
+    return n1 == n2 
+
+def permutation2(string1, string2):
+    '''
+    Checks two strings if one is a permutation of the other
+    Args:
+        string1 (str): a string
+        string2 (str): another string
+    '''
+    if len(string1) is not len(string2):
+        return False
+
+    d1, d2 = {}, {}
+    for idx in range(len(string1)):
+        d1[string1[idx]] = d1.get(string1[idx], 0) + 1
+        d2[string2[idx]] = d2.get(string2[idx], 0) + 1
+
+    return d1 == d2
+
+def permutation3(string1, string2):
+    '''
+    Checks two strings if one is a permutation of the other
+    Args:
+        string1 (str): a string
+        string2 (str): another string
+    '''
+
+
+class Test(unittest.TestCase):
+    def test1(self):
+        t1 = "nickiiii"
+        t2 = "iiiiinck"
+        x1, x2 = "hello", "world"
+        self.assertTrue(permutation(t1,t2))
+        self.assertFalse(permutation(x1, x2))
+
+    def test2(self):
+        self.assertFalse(permutation2("nickjjj", "nickkki"))
+        self.assertTrue(permutation2("iiiiinn", "nniiiii"))
+
+    def test3(self):
+        pass
+
+if __name__ == '__main__':
+    unittest.main()