strXml ="""<?xml version="1.0" encoding="utf-8"?>
    <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
      <soap12:Body>
        <SMTPEmail xmlns="http://www.test.com/123">
          <ID></ID>
          <EmailAddress>myname@company.com</EmailAddress>
          <To>myname@company.com</To>
          <CC>myname@company.com</CC>
          <BCC></BCC>
          <Subj>hello</Subj>
          <Text>hello</Text>
          <IsBodyHtml>hello</IsBodyHtml>
          <Server></Server>
          <Debug>string</Debug>
          <GUID>{12344-3434-34334-3434343-65656565h5h}</GUID>
          <Attachments></Attachments>
          <RelayCount>0</RelayCount>
        </SMTPEmail>
      </soap12:Body>
    </soap12:Envelope>"""

response = requests.post(url,data=strXml, headers=header)
print(response.content)

我可以让它工作来发送消息，但我不知道如何插入我的文件路径（例如：'C：\Users\name\Downloads\test1.xlsx'）在Attachments标签中，以将其附加到电子邮件中。