需要给以下学员发送作业反馈邮件（文件名为：学员作业反馈.xlsx） 

实现代码如下：

# 导入发送邮件的工具包
import smtplib  
# 导入邮件内容的工具包
from email.mime.multipart import MIMEMultipart    
from email.mime.text import MIMEText 
# 导入读取Excel的工具包
import pandas as pd


# 设置登录的用户名和密码
sender = '172***6917@qq.com'
password = 'wrdnb******vcjdi'

# 设置发件人和收件人邮箱
receiver = '172***6917@qq.com'


# 读取收件人邮箱和邮件内容
df = pd.read_excel('./学员作业反馈.xlsx')
for i in range(len(df)):
    student_name = df['学员姓名'][i]
    student_email = df['学员邮箱'][i]
    feed_back = df['作业反馈'][i]
    print(student_name,student_email,feed_back)
    

    # 定义邮件主题、发件人、收件人
    msg = MIMEMultipart('mixed') 
    msg['Subject'] = f'第{i}封邮件，{student_name}同学的作业反馈'
    msg['From'] = '172***6917@qq.com'
    msg['To'] = f'{student_email}'

    #构造html邮件内容，从邮箱复制出来
    html = f"""
    <div>{student_name} 同学：</div>
    <div>你好。你的作业反馈如下：</div>
    <div>{feed_back}</div>
    <div>请查收，谢谢。</div>
    <div>曹鑫CDA</div>
    """
    text_html = MIMEText(html, 'html', 'utf-8')
    msg.attach(text_html) 

    # 发送邮件
    smtp = smtplib.SMTP() 
    smtp.connect('smtp.qq.com',25) 
    smtp.login(sender, password) 
    smtp.sendmail(sender, receiver, msg.as_string()) 
    smtp.quit()

 运行效果：