def _build_vocabulary_data(self, status, study_date=None):
# create a dict with a number as key, and randomized contents matching
# the column layout of the table
self.tree.delete(*self.tree.get_children())
self.data = {}
sqlVocab = SqliteVocabulary("studyenglish.db", "vocabulary")
words = None
if study_date == None:
words = sqlVocab.query_words_with_status(status)
else:
words = sqlVocab.query_words_with_status_and_date(status, strftime("%Y-%m-%d", gmtime()))
num = 0
for w in words:
num += 1
self.data[num] = w
