imaplib - Moving mails to a folder fails without an error log-CodePudding

My python code selects some mails and move them to another folder.

# A.py

    def __init__(self):
        account = conf.account
        password = conf.password
        server = conf.imap_server
        port = conf.imap_port
        self.mail = imaplib.IMAP4_SSL(host=server, port=port)
        try:
            self.mail.login(account, password)
        except imaplib.IMAP4.error as e:
            self.logger.error("Cannot login to STMP server: %s" % str(e))


    def move_handled_mails(self, mail_list, suffix=0):
        archiving_folder = ''.join([str(current_year), '-', str(current_month), '-', str(suffix)])
        self.mail.debug = 4
        typ, data = self.mail.select(archiving_folder)
        if typ != 'OK':
            if "NONEXISTENT" in data[0].decode():
                self.mail.create(archiving_folder)
                typ, data = self.mail.select(archiving_folder)
            if "Too many mail in folder" in data[0].decode():
                return self.move_handled_mails(mail_list, suffix 1)

        if typ != 'OK':
            exit()

        for num in mail_list:
            print(num)
            typ, data = self.mail.uid('COPY', num, archiving_folder)
            if typ == 'OK':
                typ, data = self.mail.uid('STORE', num, ' FLAGS', '(\\Deleted)')
            if typ != 'OK':
                exit()
        print("Executing expunge")
        typ, data = self.mail.expunge()
        if typ != 'OK':
            exit()


    def run(self):
        res, nums = self.mail.select()  # default=INBOX
        if res != 'OK':
            self.logger.error(nums)
            exit()

        typ, msgnums = self.mail.uid('search', None, 'ALL')
        mail_list = msgnums[0].split()
        self.move_handled_mails(mail_list)

At the move_handled_mails method, creating a folder works well, but moving mails doesn't work.

Moreover, when I print all the typs and datas, they are printed as OK and None repectively.

After running the code, no error occurs, but no mail is moved either.

What could be a problem, and how should I debug this problem?

Debug log after adding self.mail.debug=4:

Mail list: [b'7144291']
  03:12.87 > b'GBDI2 SELECT 2021-11-0'
  03:13.04 < b'* FLAGS (\\Answered \\Flagged \\Deleted \\Seen \\Draft)'
  03:13.04 < b'* OK [PERMANENTFLAGS (\\Answered \\Flagged \\Deleted \\Seen \\Draft \\*)] Flags permitted.'
  03:13.04 < b'* 13534 EXISTS'
  03:13.04 < b'* 0 RECENT'
  03:13.04 < b'* OK [UNSEEN 1] First unseen.'
  03:13.04 < b'* OK [UIDVALIDITY 119] UIDs valid'
  03:13.04 < b'* OK [UIDNEXT 7129395] Predicted next UID'
  03:13.04 < b'* OK [NOMODSEQ] No permanent modsequences'
  03:13.04 < b'GBDI2 OK [READ-WRITE] Select completed.'
b'7144291'
  03:13.04 > b'GBDI3 UID COPY 7144291 2021-11-0'
  03:13.16 < b'GBDI3 OK No messages copied.'
  03:13.16 > b'GBDI4 UID STORE 7144291  FLAGS (\\Deleted)'
  03:13.30 < b'GBDI4 OK Store completed.'
Executing expunge
  03:13.30 > b'GBDI5 EXPUNGE'
  03:13.30 < b'GBDI5 OK Expunge completed.'

CodePudding user response：

Don't select the folder you're moving to. UIDs are only meaningful in their source folder. You're switching to the destination folder, then trying to move a message out of it, and that message doesn't exist.

Remove this line: typ, data = self.mail.select(archiving_folder)

Or, at least, if you need it to check that the destination folder exists, you must switch back to the source folder: self.mail.select('INBOX') or similar.