将带附件的电子邮件发送给 list/array，仅发送给列表中的最后一个人

Question

正在将电子邮件发送给不符合 if 中设置的条件的最后一个人。

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()

Answer 1

email 设置为 for 循环中的最后一个值，这就是它只将电子邮件发送给最后一个人的原因。

您应该做的是创建一个收件人列表，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)

按照此 SO post 中的答案了解更多详细信息：How to send email to multiple recipients using python smtplib?

将带附件的电子邮件发送给 list/array，仅发送给列表中的最后一个人

Send email with attachment to a list/array, only getting sent to last person in the list

python

smtplib

openpyxl