Python电子邮件附件为空

我正在尝试使用Python 2.7发送带有附件的电子邮件。除附件内容外，所有内容都正常工作，附件内容在到达时附在电子邮件上，即0 K

编码有问题吗

def sendMail(subject, text, *attachmentFilePaths):
    gmailUser = USER
    gmailPassword = PASSWORD
    recipient = RECIPIENT

    msg = MIMEMultipart()
    msg['From'] = gmailUser
    msg['To'] = recipient
    msg['Subject'] = subject
    msg.attach(MIMEText(text))

    for attachmentFilePath in attachmentFilePaths:
        msg.attach(getAttachment(attachmentFilePath))

    mailServer = smtplib.SMTP('smtp.gmail.com', 587)
    mailServer.ehlo()
    mailServer.starttls()
    mailServer.ehlo()
    mailServer.login(gmailUser, gmailPassword)
    mailServer.sendmail(gmailUser, recipient, msg.as_string())
    mailServer.close()

    print('Sent email to %s' % recipient)

def getAttachment(attachmentFilePath):
    contentType, encoding = mimetypes.guess_type(attachmentFilePath)

    if contentType is None or encoding is not None:
        contentType = 'application/octet-stream'
    mainType, subType = contentType.split('/', 1)
    file = open(attachmentFilePath, 'rb')

    if mainType == 'text':
        attachment = MIMEText(file.read())
    elif mainType == 'message':
        attachment = email.message_from_file(file)
    elif mainType == 'image':
        attachment = MIMEImage(file.read(),_subType=subType)
    elif mainType == 'audio':
        attachment = MIMEAudio(file.read(),_subType=subType)
    else:
        attachment = MIMEBase(mainType, subType)

    attachment.set_payload(file.read())
    encode_base64(attachment)
    file.close()
    attachment.add_header('Content-Disposition', 'attachment',   filename=os.path.basename(attachmentFilePath))
    return attachment

这就是你的问题：

if mainType == 'text':
    attachment = MIMEText(file.read())                      # <- read file
elif mainType == 'message':
    attachment = email.message_from_file(file)              # <- read file
elif mainType == 'image':
    attachment = MIMEImage(file.read(),_subType=subType)    # <- read file
elif mainType == 'audio':
    attachment = MIMEAudio(file.read(),_subType=subType)    # <- read file
else:
    attachment = MIMEBase(mainType, subType)

attachment.set_payload(file.read())           # <- re-read file !

如果mainType==“text”：
attachment=MIMEText（file.read（））#测试你的
getAttachment
函数是否有bug。你能更具体一点吗？我不确定从哪里开始，因为我是电子邮件模块的新手。找出错误所在。什么函数没有做它应该做的事情？为什么要将编码设置为类型？它们是两个截然不同的概念。类型告诉MIME部分包含什么类型的数据；编码是一种文本表示形式，如
base64
或
quoted printable
。谢谢！我不知道你不应该每次都设置有效载荷。