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這篇文章將為大家詳細(xì)講解有關(guān)Python中怎么實(shí)現(xiàn)詞頻統(tǒng)計(jì)功能,文章內(nèi)容質(zhì)量較高,因此小編分享給大家做個(gè)參考,希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。
import jieba with open("D:/hdfs/novels/天龍八部.txt", encoding="gb18030") as f: text = f.read() with open('D:/hdfs/novels/names.txt', encoding="utf-8") as f: for line in f: if line.startswith("天龍八部"): names = next(f).split() break for word in names: jieba.add_word(word) # 加載停用詞 with open("stoplist.txt", encoding="utf-8-sig") as f: stop_words = f.read().split() stop_words.extend(['天龍八部', '\n', '\u3000', '目錄', '一聲', '之中', '只見']) stop_words = set(stop_words) all_words = [word for word in cut_word if len(word) > 1 and word not in stop_words] print(len(all_words), all_words[:20])
結(jié)果:
216435 ['天龍', '釋名', '青衫', '磊落', '險(xiǎn)峰', '行玉壁', '月華', '明馬', '疾香', '幽崖', '高遠(yuǎn)', '微步', '生家', '子弟', '家院', '計(jì)悔情', '虎嘯', '龍吟', '換巢', '鸞鳳']
原始字典自寫代碼統(tǒng)計(jì):
wordcount = {} for word in all_words: wordcount[word] = wordcount.get(word, 0)+1 sorted(wordcount.items(), key=lambda x: x[1], reverse=True)[:10]
使用計(jì)數(shù)類進(jìn)行詞頻統(tǒng)計(jì):
from collections import Counter wordcount = Counter(all_words) wordcount.most_common(10)
結(jié)果:
使用pandas進(jìn)行詞頻統(tǒng)計(jì):
pd.Series(all_words).value_counts().head(10)
Pandas只能對(duì)已經(jīng)分好的詞統(tǒng)計(jì)詞頻,所以這里不再演示。上面的測(cè)試表示,Counter直接對(duì)列表進(jìn)行計(jì)數(shù)比pyhton原生帶快,但循環(huán)中的表現(xiàn)還未知,下面再繼續(xù)測(cè)試一下。
首先使用原生API直接統(tǒng)計(jì)詞頻并排序:
%%time wordcount = {} for word in jieba.cut(text): if len(word) > 1 and word not in stop_words: wordcount[word] = wordcount.get(word, 0)+1 print(sorted(wordcount.items(), key=lambda x: x[1], reverse=True)[:10])
結(jié)果:
[('段譽(yù)', 2496), ('說道', 2151), ('虛竹', 1633), ('蕭峰', 1301), ('武功', 1095), ('阿紫', 922), ('阿朱', 904), ('喬峰', 900), ('王語嫣', 877), ('慕容復(fù)', 871)] Wall time: 6.04 s
下面我們使用Counter統(tǒng)計(jì)詞頻并排序:
%%time wordcount = Counter() for word in jieba.cut(text): if len(word) > 1 and word not in stop_words: wordcount[word] += 1 print(wordcount.most_common(10))
結(jié)果:
[('段譽(yù)', 2496), ('說道', 2151), ('虛竹', 1633), ('蕭峰', 1301), ('武功', 1095), ('阿紫', 922), ('阿朱', 904), ('喬峰', 900), ('王語嫣', 877), ('慕容復(fù)', 871)] Wall time: 6.21 s
關(guān)于Python中怎么實(shí)現(xiàn)詞頻統(tǒng)計(jì)功能就分享到這里了,希望以上內(nèi)容可以對(duì)大家有一定的幫助,可以學(xué)到更多知識(shí)。如果覺得文章不錯(cuò),可以把它分享出去讓更多的人看到。
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