attachments.py 文件源码

def get_extension(attachment):
    """

    """
    try:
        filename = attachment.get_filename()
        if filename:
            extension = os.path.splitext(filename)[1]
        else:
            extension = mimetypes.guess_extension(attachment.get_content_type())
        return extension or '.bin'

    except AttributeError:
        return None