Question

I’m going to make a list of recipients in for loop then use send_mail :

for participant in participants:
   list.append(participant.mail)

then:

send_mail(email_subject,email_body,'[e-mail]',list,fail_silently=False)

what’s the right way to make this list?

Answer 1

Well, what you have will work, assuming you define a list to use, first:

emails = []
for participant in participants:
    emails.append(participant.email)

But, a list comprehension is easier:

emails = [p.email for p in participants]