Python 将带有附件的电子邮件发送到列表/阵列，仅发送给列表中的最后一个人

电子邮件将发送给最后一个不符合

if

中设置的标准的人

我不明白为什么它不会将电子邮件发送给文件中符合条件的其他人

import smtplib, openpyxl, sys from email.mime.multipart 
import MIMEMultipart from email.mime.text 
import MIMEText from email.mime.base 
import MIMEBase from email 
import encoders    
wb = openpyxl.load_workbook('Book1.xlsx')
sheet = wb.get_sheet_by_name('Sheet1')    

lastCol = sheet.max_column  
latestMonth = sheet.cell(row=1, column=lastCol).value

unpaidMembers = {}   
for r in range(2, sheet.max_row + 1):
    payment = sheet.cell(row=r, column=lastCol).value
    if payment != 'Y':
        name = sheet.cell(row=r, column=1).value
        email = sheet.cell(row=r, column=2).value
        unpaidMembers[name] = email

fromaddr = "xxx@xxxx.com"

msg = MIMEMultipart()

msg['From'] = fromaddr
msg['To'] = email
msg['Subject'] = "Hi"

body = "Hello, This is a test message. Please check attachment"

msg.attach(MIMEText(body, 'plain'))

filename = "xxxxx.pdf"
attachment = open("\\\xxxx.pdf","rb")

part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment; filename= %s" %  filename)

msg.attach(part)

smtp0bj = smtplib.SMTP('smtp-mail.outlook.com', 587)
smtp0bj.ehlo()
smtp0bj.starttls()
smtp0bj.login(fromaddr, 'xxxx')
text = msg.as_string()
smtp0bj.sendmail(fromaddr, email, text)
smtp0bj.quit()

---

email

设置为for循环中的最后一个值，这就是为什么它只将电子邮件发送给最后一个人

您应该做的是创建收件人列表，然后使用该信息：

...
...
recipients = []
unpaidMembers = {}   
for r in range(2, sheet.max_row + 1):
    payment = sheet.cell(row=r, column=lastCol).value
    if payment != 'Y':
        name = sheet.cell(row=r, column=1).value
        email = sheet.cell(row=r, column=2).value
        unpaidMembers[name] = email
        recipients.append(email) 

...
...
msg["To"] = ", ".join(recipients)
...
...
smtp0bj.sendmail(fromaddr, recipients, text)

---

请按照此SO帖子中的答案查看更多详细信息：

谢谢。这非常有效。但是，我不想一次发送邮件给每个人，一次只发送一个收件人。i、 e.每个收件人一封邮件。我会读你贴的帖子。