Added solution

Author: avidLearnerInProgress

valid_palindrome.py

@@ -0,0 +1,16 @@
+class Solution:
+    def isPalindrome(self, s: str) -> bool:
+        s = s.lower()
+        stt = []
+        for st in s:
+            if st >= 'a' and st <= 'z' or st >= '0' and st <= '9':
+                stt.append(st)
+        print(stt)
+        i = 0; j = len(stt) - 1
+        
+        while(i <= j):
+            if stt[i] != stt[j]:
+                return False
+            i += 1
+            j -= 1
+        return True