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我想計算幾個csv文件中單詞的出現次數。首先,我想展示10個最常遇到的單詞,其中有停用詞,然後沒有停用詞。在沒有停用詞的多個csv文件中計算單詞的頻率
這是我的代碼:
import nltk
nltk.download("stopwords")
from nltk.corpus import stopwords
myfile = sc.textFile('./Sacramento*.csv')
counts = myfile.flatMap(lambda line: line.split(",")).map(lambda word: (word, 1)).reduceByKey(lambda v1,v2: v1 + v2)
sorted_counts = counts.map(lambda (a, b): (b, a)).sortByKey(0, 1).map(lambda (a, b): (b, a))
first_ten = sorted_counts.take(10)
first_ten
Out[7]:
[(u'Residential', 917),
(u'2', 677),
(u'CA', 597),
(u'3', 545),
(u'SACRAMENTO', 439),
(u'ours', 388),
(u'0', 387),
(u'4', 277),
(u'Mon May 19 00:00:00 EDT 2008', 268),
(u'Fri May 16 00:00:00 EDT 2008', 264)]
cachedStopWords = stopwords.words("english")
result_ll = counts.map(lambda (a, b): (b, a)).sortByKey(0,
1).map(lambda (a, b): (b, a))
print [i for i in result_ll.take(10) if i not in cachedStopWords]
但產量仍與停止的話 - 「我們」 也停用詞
[(u'Residential」,917),(U'2之間(u'CA',597),(u'3',545),(u'SACRAMENTO',439),(u'ours',388),(u'0',387), (u'4',277),(u'Mon May 19 00:00:00 EDT 2008',268),(u'Fri May 16 00:00:00 EDT 2008',264)]
How我應該改變我的代碼,所以輸出沒有停止詞:「我們的」?