这批词里哪个出现得最多

一批搜索词：苹果、香蕉、苹果、梨、香蕉、苹果。运行下面这段程序：

def word_count(words):
    c = {}
    for w in words:
        c[w] = c.get(w, 0) + 1
    return c

def top_word(words):
    c = word_count(words)
    best = ""
    for w in c:
        if best == "" or c[w] > c[best]:
            best = w
    return best

print(top_word(["苹果", "香蕉", "苹果", "梨", "香蕉", "苹果"]))