new_contents: class Solution(object):
      def countBattleships(self, board):
          """
          :type board: List[List[str]]
          :rtype: int
          """
          ans = 0
          for r, row in enumerate(board):
              for c, v in enumerate(row):
                  if v == 'X':
                      if r > 0 and board[r - 1][c] == 'X':
                          pass
                      elif c > 0 and board[r][c - 1] == 'X':
                          pass
                      else:
                          ans += 1
          return ans
  
subject: Add py solution for 419. Battleships in a Board