代码如下：

import rest = input('请输入内容:')words = re.findall('[a-zA-Z]+', st)words1=list(set(words))word_dict={}for key in words1:word_dict[key] = 0for key in word_dict:for word in words:if key == word:word_dict[key] += 1for key, val in word_dict.items():if val == max(word_dict.values()):print(key,val)pass

运行结果：

请输入内容: a a b, c, c

c 2

a 2