使用hashlib判断两个大文件的一致性

    def file_md5(path):
        '''
        获取文件的md5
        :param path:文件路径
        :return: 返回密文
        '''
        import hashlib
        import os
        file_md5 = hashlib.md5()
        size = os.path.getsize(path)
        with open(path, mode='rb') as f:
            while size > 1024:
                content = f.read(1024)
                file_md5.update(content)
                size -= 1024
            else:
                content = f.read(size)
                file_md5.update(content)
                size = 0
        return file_md5.hexdigest()