Python中对XML文件的编码转换问题

# filepath -- 原文件路径
# savefilepath -- 转换后文件存储路径（默认 = 原文件路径）
# oldencoding -- 原文件的编码格式
# newencoding -- 转换后文件的编码格式
def convert_xml_encoding(filepath, savefilepath=filepath, oldencoding, newencoding):
    # Read the XML file
    with open(filepath, 'rb') as file:
        content = file.read()

    # Decode the content from old encoding
    # 出现错误时忽略 errors='ignore'
    decoded_content = content.decode(oldencoding, errors='ignore')
    # decoded_content = content.decode('GBK')


    # Update the encoding in the XML header
    updated_content = decoded_content.replace('encoding="{}"'.fORMat(oldencoding),
                                               'encoding="{}"'.format(newencoding))

    # Encode the content to new encoding
    # 出现错误时忽略 errors='ignore'
    encoded_content = updated_content.encode(newencoding,errors='ignore')

    # Write the updated content to the file
    with open(savefilepath, 'wb') as file:
        file.write(encoded_content)

    # Result output
    print(f"XML file '{os.path.basename(filepath)}'({oldencoding}) --> '{os.path.basename(savefilepath)}'({newencoding})")

# ---------------------- 使用示例 ---------------------
# GBK --> utf-8
convert_xml_encoding(filepath, savefilepath1, 'GBK', 'utf-8')
# utf-8 --> gb2312
convert_xml_encoding(filepath, savefilepath1, 'utf-8', 'gb2312')
# GBK --> gb2312
convert_xml_encoding(filepath, savefilepath1, 'GBK', 'gb2312')