如何在windows-1251字符集中删除字符串上的未知字符

def remove_unknown_chars(input_str, encoding='windows-1251'):
    # 将字符串解码为Unicode
    decoded_str = input_str.decode(encoding, errors='ignore')
    # 将Unicode字符串重新编码为Windows-1251，忽略无法编码的字符
    cleaned_str = decoded_str.encode(encoding, errors='ignore').decode(encoding)
    return cleaned_str

# 示例字符串
input_string = b'\xd0\x9f\xd1\x80\xd0\xb8\xd0\xb2\xd0\xb5\xd1\x82\xd1\x8c \xd0\xbc\xd0\xb5\xd1\x82\xd0\xbe\xd0\xb4\xd0\xbe\xd0\xb2\xd0\xb0\xd1\x82\xd1\x8c'.decode('windows-1251')

# 清理字符串
cleaned_string = remove_unknown_chars(input_string.encode('windows-1251'))

print("原始字符串:", input_string)
print("清理后的字符串:", cleaned_string)