(debug console) convert tags to subdecks

gistfile1.txt

import re

cnt = 0
nids = mw.col.findNotes("""
      "deck:uTalk GCSE Italian"
""".strip())
for nid in nids:
  note = mw.col.getNote(nid)
  deck = mw.col.decks.get(note.cards()[0].did)
  tags = note['Topic'].split('::')
  subdecks = '::'.join(tags[1:])
  subdecks = subdecks.replace('_', ' ')
  deckname = "{}::{}".format(deck['name'], subdecks)
  did = mw.col.decks.id(deckname)
  cids = [c.id for c in note.cards()]
  mw.col.decks.setDeck(cids, did)
  note.flush()
  cnt += 1
mw.reset()

print('Found {} notes.'.format(len(nids)))
print('Updated {} notes.'.format(cnt))