python怎么识别文件格式

"""

自动识别 文本编码格式

"""

import chardet

def detectCode(path):

    with open(path, 'rb') as file:

        data = file.read(20000)

        dicts = chardet.detect(data)

    return dicts["encoding"]

def print_data_1(path):

    """

    这种编码通过命令行 file -i 文件名获取编码格式，

    通过测试，使用file 命令获取的编码格式不能获取正确的编码数据

    :param path:

    :return:

    """

    with open(path, "r", encoding="iso-8859-1") as f:

        i = 0

        for line in f:

            print(line)

            i += 1

            if i == 5:

                break

    f.close()

def print_data_2(path):

    print("-------------------------------")

    with open(path, "r", encoding="{0}".format(detectCode(path))) as f:

        i = 0

        for line in f:

            b_line = line.encode("utf-8")  # 将文件内容转化为utf-8格式

            print(chardet.detect(b_line)['encoding'])  # 输出转化为内容格式

            i += 1

            if i == 5:

                break

    f.close()

if __name__ == '__main__':

    path = "test.txt"

    print(detectCode(path))

    # print_data_1(path)

    print_data_2(path)