def incr_wcd(wcd, wdict, strength, due_date, ask_date, count):
    strength_to_word_count = wcd.setdefault((wdict, ask_date), {})
    key = (strength, due_date)
    try:
        strength_to_word_count[key] += count
    except __HOLE__:
        strength_to_word_count[key] = count
dataset/ETHPy150Open hcs42/ExponWords/models.py/incr_wcd