title: How do I download only unread attachments from a specific gmail label?
body: <p>I have a Python script adapted from <a href="https://stackoverflow.com/questions/7596789/downloading-mms-emails-sent-to-gmail-using-python">Downloading MMS emails sent to Gmail using Python</a></p>
  
  <pre><code>import email, getpass, imaplib, os
  
  detach_dir = '.' # directory where to save attachments (default: current)
  user = raw_input("Enter your GMail username:")
  pwd = getpass.getpass("Enter your password: ")
  
  # connecting to the gmail imap server
  m = imaplib.IMAP4_SSL("imap.gmail.com")
  m.login(user,pwd)
  m.select("[Gmail]/All Mail") # here you a can choose a mail box like INBOX instead
  # use m.list() to get all the mailboxes
  
  resp, items = m.search(None, 'FROM', '"Impact Stats Script"') # you could filter using the IMAP rules here (check http://www.example-code.com/csharp/imap-search-critera.asp)
  items = items[0].split() # getting the mails id
  
  for emailid in items:
      resp, data = m.fetch(emailid, "(RFC822)") # fetching the mail, "`(RFC822)`" means "get the whole stuff", but you can ask for headers only, etc
      email_body = data[0][1] # getting the mail content
      mail = email.message_from_string(email_body) # parsing the mail content to get a mail object
  
      #Check if any attachments at all
      if mail.get_content_maintype() != 'multipart':
          continue
  
      print "["+mail["From"]+"] :" + mail["Subject"]
  
      # we use walk to create a generator so we can iterate on the parts and forget about the recursive headach
      for part in mail.walk():
          # multipart are just containers, so we skip them
          if part.get_content_maintype() == 'multipart':
              continue
  
          # is this part an attachment ?
          if part.get('Content-Disposition') is None:
              continue
  
          filename = part.get_filename()
          counter = 1
  
          # if there is no filename, we create one with a counter to avoid duplicates
          if not filename:
              filename = 'part-%03d%s' % (counter, 'bin')
              counter += 1
  
          att_path = os.path.join(detach_dir, filename)
  
          #Check if its already there
          if not os.path.isfile(att_path) :
              # finally write the stuff
              fp = open(att_path, 'wb')
              fp.write(part.get_payload(decode=True))
              fp.close()
  </code></pre>
  
  <p>I am filtering messages by subject and getting the attachments, but now I need to only get attachments from <em>new</em> emails. Can I modify the <code>m.search()</code> somehow to return only unread emails?</p>