adding isomorphic strings algo

src/my_project/interviews/top_150_questions_round_11/isomorphic_strings.py

@@ -0,0 +1,7 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def isIsomorphic(self, s: str, t: str) -> bool:
+
+        return len(set(zip(s,t))) == len(set(s)) == len(set(t))

tests/test_150_questions_round_11/test_isomorphic_strings_round_11.py

@@ -0,0 +1,17 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_11\
+.isomorphic_strings import Solution
+
+class IsomorphicStringsTestCase(unittest.TestCase):
+
+    def test_are_isomorphic_strings(self):
+        solution = Solution()
+        output = solution.isIsomorphic(s="egg", t="add")
+        self.assertTrue(output)
+
+    def test_are_not_isomorphic_strings(self):
+        solution = Solution()
+        output = solution.isIsomorphic(s="foo", t="bar")
+        self.assertFalse(output)
+
+