python | 统计字符串中各个字符出现的次数并返回出现次数最多的字符

找出字符串中出现次数最多的字符

string = "abcdaab"
word_frequency = dict()
for ch in string:
    if ch not in word_frequency.keys():
        word_frequency[ch] = 1
    else:
        word_frequency[ch] += 1
print(word_frequency)
print(max(word_frequency, key=word_frequency.get))

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