adding algo

src/my_project/interviews/top_150_questions_round_20/word_pattern.py

@@ -0,0 +1,21 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def wordPattern(self, pattern: str, s: str) -> bool:
+
+        dic_answer = dict()
+
+        words = s.split(' ')
+
+        if len(words) != len(pattern) or len(set(words)) != len(set(pattern)):
+            return False 
+        else: 
+            for k, v in enumerate(words):
+                if v in dic_answer:
+                    if dic_answer[v] != pattern[k]:
+                        return False 
+                else:
+                    dic_answer[v] = pattern[k]
+
+            return True 

tests/test_150_questions_round_20/test_word_pattern_round_20.py

@@ -0,0 +1,20 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_20\
+.word_pattern import Solution
+
+class WordPatternTestCase(unittest.TestCase):
+
+    def test_is_word_pattern(self):
+        solution = Solution()
+        output = solution.wordPattern(pattern="abba", s="dog cat cat dog")
+        self.assertTrue(output)
+
+    def test_is_no_word_pattern_one(self):
+        solution = Solution()
+        output = solution.wordPattern(pattern="abc", s="dog cat cat fish")
+        self.assertFalse(output)
+
+    def test_is_no_word_pattern_two(self):
+        solution = Solution()
+        output = solution.wordPattern(pattern="aa", s="dog cat cat fish")
+        self.assertFalse(output)