! python3

sendDuesReminders.py - Sends emails based on their status in spreadsheet.

import openpyxl, smtplib, sys

Open the spreadsheet and get the latest dues status.

wb = openpyxl.load_workbook('duesRecords.xlsx')
sheet = wb.get_sheet_by_name('Sheet1')

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

unpaidMembers = {}

Check each member's payment status

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

Log in to email account.

smtpObj = smtplib.SMTP('smtp.gmail.com', 587)
smtpObj.ehlo()
smtpObj.starttls()
smtpObj.login('my_email_address@gmail.com', sys.argv[1])

Send out reminder emails.

for name, email in unpaidMembers.items():
body = 'Subject: %s dues unpaid.\nDear %s,\nRecords show that you have not paid dues for %s. Please make this payment as soon as possible. Thank you!' % (latestMonth, name, latestMonth)
print('Sending email to %s...' % email)
sendmailStatus = smtpObj.sendmail('my_email_address@gmail.com', email, body)

if sendmailStatus != {}:
    print('There was a problem sending email to %s: %s' % (email, sendmailStatus))

smtpObj.quit()