mapping = { 'INBOX':                   'inbox'
          , '[Google Mail]/All Mail':  'archive'
          , '[Google Mail]/Drafts':    'drafts'
          , '[Google Mail]/Important': 'important'
          , '[Google Mail]/Sent Mail': 'sent'
          , '[Google Mail]/Spam':      'spam'
          , '[Google Mail]/Starred':   'flagged'
          , '[Google Mail]/Bin':       'bin'
 }

r_mapping = { val: key for key, val in mapping.items() }

def transremote(foldername):
    return mapping.get(foldername, foldername)

def translocal(foldername):
    return r_mapping.get(foldername, foldername)

top = [ 'inbox'
      , 'flagged'
      , 'cadscan'
      , 'chakra'
      , 'unimaas'
      , 'clementine'
      , 'youtube'
      , 'hotmail'
      ]

bot = [ 'archive'
      , 'drafts'
      , 'spam'
      , 'bin'
      ]

def sort_key(d):
    folder = d['foldername']
    if folder in top:
        return top.index(folder)
    elif folder in bot:
        return 21 + bot.index(folder)
    return 20