[Leetcode][python]Same Tree/相同的树

class Solution(object):
    def isSameTree(self, p, q):
        if p == None and q == None: return True
        if p and q and p.val == q.val:
            return self.isSameTree(p.left, q.left) and self.isSameTree(p.right, q.right)
        return False