20180805：请找出s=”aabbccddxxxxffff”中 ，出现次数最多的字母

# encoding=utf-8

s="aabbccddxxxxffff"
max_occurence_times_letters = []
max_occurence_times = 0
for i in s:
    if s.count(i) > max_occurence_times:
        max_occurence_times_letters=[]
        max_occurence_times_letters.append(i)
        max_occurence_times = s.count(i)
    elif s.count(i) == max_occurence_times:
        max_occurence_times_letters.append(i)

print(list(set(max_occurence_times_letters)))
 

输出结果：

>>> print(list(set(max_occurence_times_letters)))
['x', 'f']