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from cppy . cp_util import testfilepath
from sqlalchemy . orm import sessionmaker
from createDb import TextFile , WordFrequency , engine
def get_top_n_word_frequencies ( filepath , n = 10 ) :
Session = sessionmaker ( bind = engine )
session = Session ( )
textfile = session . query ( TextFile ) . filter_by ( filepath = filepath ) . first ( )
if textfile :
# 查询词频并按频率降序排序，
word_freqs = ( session . query ( WordFrequency )
. filter_by ( textfile = textfile )
. order_by ( WordFrequency . frequency . desc ( ) )
. limit ( n )
. all ( ) )
# 输出词频最高的N个词
for wf in word_freqs :
print ( f " { wf . word } : { wf . frequency } " )
else :
print ( f " File { filepath } not found in the database. " )
session . close ( )
if __name__ == ' __main__ ' :
get_top_n_word_frequencies ( testfilepath )
