如何用Python发送email及附件？

1.导入所需模块和库：

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.application import MIMEApplication

2.设置发送邮件的基本信息：

smtp_server = 'smtp.qq.com'  # SMTP服务器地址
smtp_port = 465  # SMTP服务器端口
smtp_user = 'your_email@qq.com'  # 发送邮件的邮箱
smtp_password = 'your_email_password'  # 发送邮件的邮箱密码
from_addr = 'your_email@qq.com'  # 发件人邮件地址
to_addr = 'receiver_email@qq.com'  # 收件人邮件地址

3.创建邮件：

msg = MIMEMultipart()  # 创建邮件实例
msg['From'] = from_addr  # 设置发件人
msg['To'] = to_addr  # 设置收件人
msg['Subject'] = '邮件主题'  # 设置邮件主题

4.添加邮件正文：

content = '邮件正文'
text = MIMEText(content)
msg.attach(text)  # 添加正文到邮件实例中

5.添加附件：

with open('file_path', 'rb') as f:
    attachment = MIMEApplication(f.read())
    attachment.add_header('Content-Disposition', 'attachment', filename='file_name')
    msg.attach(attachment)  # 添加附件到邮件实例中

6.发送邮件：

with smtplib.SMTP_SSL(smtp_server, smtp_port) as server:
    server.login(smtp_user, smtp_password)  # 登录SMTP服务器
    server.sendmail(from_addr, to_addr, msg.as_string())  # 发送邮件

完整代码示例：

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.application import MIMEApplication

smtp_server = 'smtp.qq.com'  # SMTP服务器地址
smtp_port = 465  # SMTP服务器端口
smtp_user = 'your_email@qq.com'  # 发送邮件的邮箱
smtp_password = 'your_email_password'  # 发送邮件的邮箱密码
from_addr = 'your_email@qq.com'  # 发件人邮件地址
to_addr = 'receiver_email@qq.com'  # 收件人邮件地址

msg = MIMEMultipart()  # 创建邮件实例
msg['From'] = from_addr  # 设置发件人
msg['To'] = to_addr  # 设置收件人
msg['Subject'] = '邮件主题'  # 设置邮件主题

content = '邮件正文'
text = MIMEText(content)
msg.attach(text)  # 添加正文到邮件实例中

with open('file_path', 'rb') as f:
    attachment = MIMEApplication(f.read())
    attachment.add_header('Content-Disposition', 'attachment', filename='file_name')
    msg.attach(attachment)  # 添加附件到邮件实例中

with smtplib.SMTP_SSL(smtp_server, smtp_port) as server:
    server.login(smtp_user, smtp_password)  # 登录SMTP服务器
    server.sendmail(from_addr, to_addr, msg.as_string())  # 发送邮件