<s> """<STR_LIT>""" <EOL> import numpy as np <EOL> def ds_hann ( n ) : <EOL> """<STR_LIT>""" <EOL> x = np . arange ( n , dtype = '<STR_LIT>' ) <EOL> return <NUM_LIT> * ( <NUM_LIT:1> - np . cos ( <NUM_LIT:2> * np . pi * x / n ) ) </s>
