def onehot2transactional(df, ):
assert df.max().max() == 1, 'Not onehot encoded'
te = TransactionEncoder()
te.columns_ = list(df.columns)
te.columns_mapping_ = {}
for i, c in enumerate(te.columns_):
te.columns_mapping_[i] = c
res = te.inverse_transform(df.values)
return res
