Leetcode71-简化路径

class Solution:
    def simplifyPath(self, path: str) -> str:
        l = path.split('/')
        res = []
        for i in range(len(l)):
            if l[i] == '..':
                if res:
                    res.pop()
            elif l[i] != '' and l[i] != '.':
                res.append(l[i])
        return '/' + '/'.join(res)