Variable value in while True-CodePudding

while True:
    lenreplay = len(mail.reply())
    print(lenreplay)
    if len(mail.reply()) > lenreplay:
        print('done')
        print(mail.reply()[0])

At some point the length of mail.reply() will no longer be what it was before. I want the if to work. Please note that if here in my code doesn't always work. It only works if the computing process was between lenreplay = len(mail.reply()) and if len(mail.reply()) > lenreplay:. I want for it to always work.

mail.reply() is a group of emails inside a list. If I sent an email that list will get a new length, which means it will become bigger than it was before.

Any suggestions?

CodePudding user response：

Is len(mail.reply()) checking the current number of replies to some mail? And you want this loop to continue until an additional reply has been received? Why not put lenreplay = len(mail.reply()) outside the loop and add a small delay (like time.sleep(1)) to avoid constantly checking?

I.e.:

from time import sleep

number_of_replies = len(mail.reply())
while True:
    print(number_of_replies)
    sleep(1)  # maybe wait a second here, to avoid spamming the call
    if len(mail.reply()) > number_of_replies:
        print('done')
        print(mail.reply()[0])
        break

I renamed the variable, since its previous name didn't make that much sense. Also, I added break to exit the loop; if you didn't have break because you want this to run forever, this would work:

from time import sleep

while True:
    number_of_replies = len(mail.reply())
    while True:
        print(number_of_replies)
        sleep(1)
        if len(mail.reply()) > number_of_replies:
            print('done')
            print(mail.reply()[0])
            break

CodePudding user response：

If I understand correctly, I think this is what you want:

while len(mail.reply()) <= lenreplay:
  lenreplay = len(mail.reply())

print(lenreplay)
print('done')
print(mail.reply()[0])