train_set = martix[martix['date_block_num'] > 11].fillna(0) del martix gc.collect()
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-54-6eb473981dd5> in <module> 1 train_set = martix[martix['date_block_num'] > 11].fillna(0) 2 del martix ----> 3 del filtered 4 gc.collect()
NameError: name 'filtered' is not defined