Add examples of prompt_toolkit

isomorphic_strings.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+from collections import Counter
+
+def isIsometric(s, t):
+    if len(s) != len(t):
+        return False
+
+    s_dict = {}
+    t_dict = {}
+
+    for index in range(len(s)):
+        if s[index] not in s_dict:
+            s_dict[s[index]] = t[index]
+        if t[index] not in t_dict:
+            t_dict[t[index]] = s[index]
+
+        if s_dict[s[index]] != t[index] or t_dict[t[index]] != s[index]:
+            return False
+    return True
+
+
+if __name__ == '__main__':
+    s = 'egg'
+    t = 'add'
+    print(isIsometric(s, t)) # True
+
+    s = 'foo'
+    t = 'bar'
+    print(isIsometric(s, t)) # False
+
+    s = 'paper'
+    t = 'title'
+    print(isIsometric(s, t)) # True
+
+    s = 'ab'
+    t = 'aa'
+    print(isIsometric(s, t)) # False
+
+    s = 'bbbaaaba'
+    t = 'aaabbbba'
+    print(isIsometric(s, t)) # False