add solution in Python for 0009_palindrome_number.py

Author: Saimon398

python_solutions/0009_palindrome_number.py

@@ -0,0 +1,12 @@
+def isPalindrome(self, x: int) -> bool:
+  string = str(x)
+  i = 0
+  j = len(string) - 1
+        
+  while (i < j):
+    if (string[i] != string[j]):
+      return False
+    i += 1
+    j -= 1
+            
+  return True