[Leetcode][python]Count and Say/报数

class Solution(object):

    def count(self,s):
        result = '' 
        count = 0
        char = '#'
        for i in s:
            if i!=char:
                if char!='#':
                    result+=str(count)+char
                char = i
                count = 1
            else:
                count+=1
        result += str(count)+char
        return result

    def countAndSay(self, n):
        """
        :type n: int
        :rtype: str
        """
        s='1'
        for i in range(1, n):
            s=self.count(s)
        return s