正确处理Python邮件附件文件名中的空格

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders
import os

def prepare_attachment(filepath):
    filename = os.path.basename(filepath)
    attachment = open(filepath, "rb")

    # instance of MIMEBase and named as p
    p = MIMEBase('application', 'octet-stream')

    # To change the payload into encoded form.
    p.set_payload((attachment).read())

    # encode into base64
    encoders.encode_base64(p)

    # 使用双引号将文件名括起来
    p.add_header('Content-Disposition', 'attachment; filename="%s"' % filename)

    return p


class Sender(object):

    def __init__(self, sender_email, sender_password, recipient_email, attachments):
        self.sender_email = sender_email
        self.sender_password = sender_password
        self.recipient_email = recipient_email
        self.attachments = attachments

    def send(self):
        msg = MIMEMultipart()
        msg['From'] = self.sender_email
        msg['To'] = self.recipient_email
        msg['Subject'] = "Email with attachments"

        body = "This is the email body"
        msg.attach(MIMEText(body, 'plain'))

        # open the file to be sent
        for attachment in self.attachments:

            p = prepare_attachment(attachment)

            # attach the instance 'p' to instance 'msg'
            msg.attach(p)

        # creates SMTP session
        s = smtplib.SMTP('smtp.gmail.com', 587)

        # start TLS for security
        s.starttls()

        # Authentication
        s.login(self.sender_email, self.sender_password)

        # Converts the Multipart msg into a string
        text = msg.as_string()

        # sending the mail
        s.sendmail(self.sender_email, self.recipient_email, text)

        # terminating the session
        s.quit()


# 示例用法
if __name__ == '__main__':
    sender_email = "your_email@gmail.com"  # 你的邮箱地址
    sender_password = "your_password"  # 你的邮箱密码
    recipient_email = "recipient_email@example.com"  # 收件人邮箱地址
    attachments = ["my attachment.pdf", "another file with spaces.txt"]  # 附件列表

    sender = Sender(sender_email, sender_password, recipient_email, attachments)
    sender.send()