我尝试从收件箱文件夹中删除邮件，但是，但是当我切换到“所有邮件”文件夹时，删除将不起作用。expunge()方法返回('OK',[None])并且消息未删除：

>>>import imaplib
>>>server = imaplib.IMAP4_SSL('imap.gmail.com','993')
>>>server.login('likvidator89@gmail.com','Password')
>>>server.select('inbox')
>>>for i in server.search(None,'all')[1][0].split():
...    print i+"\n"+server.fetch(i,'(BODY[HEADER.FIELDS (Subject)])')[1][0][1]
...
#  that how i know what UID hame my message? I select by subject
#....
#28
#Subject: 1 Question Has 1 Answer - Stack Overflow
#
#
#29
#Subject: 2222222222
#...
>>>server.store(29,'+FLAGS','\\Deleted')
#('OK', ['29 (FLAGS (\\Seen \\Deleted))'])
>>>server.expunge()
#('OK', ['29'])
>>> server.select('[Gmail]/All Mail')
('OK', ['47'])
>>> for i in server.search(None,'all')[1][0].split():
...  print i+"\n"+server.fetch(i,'(BODY[HEADER.FIELDS (Subject)])')[1][0][1]
... 
#....
#
#46
#Subject: 2222222222
#
#
#47
#Subject: 3333333333333333
#
#....
>>> server.store(47,'+FLAGS','\\Deleted')
('OK', ['47 (FLAGS (\\Seen \\Deleted))'])
>>> server.expunge()
('OK', [None])