如何从文本文件中提取字符

# 打开文本文件
file = open("example.txt", "r")

# 读取文件内容
content = file.read()

# 提取字符
characters = [char for char in content if char.isalpha()]

# 处理提取的字符
# 统计字符出现的频率
char_frequency = {}
for char in characters:
    if char in char_frequency:
        char_frequency[char] += 1
    else:
        char_frequency[char] = 1

# 输出字符频率
for char, frequency in char_frequency.items():
    print(f"Character '{char}' appears {frequency} times.")

# 关闭文件
file.close()