'gbk' codec can't decode byte ... 的解决办法

# 读取目标文件
    try:
        with open(file_path, 'r', encoding='UTF-8') as f:
            str_ori = f.read()
    except:
        with open(file_path, 'r', encoding='gb18030', errors='ignore') as f:
            str_ori = f.read()
    finally:
        if f in locals():
            f.close()