查找句子中最高频率的字母- python

def find_most_frequent_letter(sentence):
    # 将句子中的字母转换为小写，并去除空格
    sentence = sentence.lower().replace(" ", "")
    
    # 创建一个字典来存储每个字母的频率
    letter_freq = {}
    
    # 遍历句子中的每个字母
    for letter in sentence:
        # 如果字母已经在字典中，则增加其频率
        if letter in letter_freq:
            letter_freq[letter] += 1
        # 如果字母不在字典中，则将其添加到字典，并将频率初始化为1
        else:
            letter_freq[letter] = 1
    
    # 找到频率最高的字母
    max_freq = 0
    most_frequent_letter = ""
    for letter, freq in letter_freq.items():
        if freq > max_freq:
            max_freq = freq
            most_frequent_letter = letter
    
    return most_frequent_letter

# 测试
sentence = "This is a sample sentence."
most_frequent_letter = find_most_frequent_letter(sentence)
print("The most frequent letter in the sentence is:", most_frequent_letter)