第四次作業

**詞頻統計：

**：

1

#usr/bin/env/python2#
-*- coding:utf-8 -*-34
import
jieba
5import
jieba.posseg as psg
67 with open("
nottrustanyone.txt
", 'r'
) as f:
8 nottrustanyone =f.read()910
#去掉非漢字的字元
11for ch in
nottrustanyone:
12if ch.isalpha() is
false:
13 nottrustanyone = nottrustanyone.replace(ch, "")14
1516
#分詞並轉成乙個列表
17 nottrustanyonelist = [x.word for x in psg.cut(nottrustanyone) if x.flag.startswith('n'
)]1819#
詞頻統計，用字典儲存，並按出現次數降序排序
20 myset =set(nottrustanyonelist)
2122 keylist =
23 valuelist =
2425
for word in
myset:
2627
2829 wordcount =dict(zip(keylist, valuelist))
3031
#字典排序函式(並取top20):
3233
34def
sortdict(mydict):
35 templist =list()
36for i in
mydict.items():
3738 templist.sort(key=lambda x: x[1], reverse=true)
39 mydict = dict(templist[0:21])
40return
mydict
4142
43 wordcount =sortdict(wordcount)
4445#輸出
46print("
單詞 出現次數
".center(13))
47for word in
wordcount.keys():
48print(word.center(13), wordcount[word])

英文歌曲頻次統計：

**：

with open("

halloffame.txt
", 'r'
) as f:
halloffame =f.read().lower()
#去除標點符號，並按行分隔
sep = "
,.!、!@#$%^'
"for ch in
sep:
halloffame = halloffame.replace(ch, ""
)halloffamelist = halloffame.split("\n"
)#對每行用空格分隔
temp =
for i in
halloffamelist:
temp.extend(i.split(""
))halloffamelist = list(x for x in temp if x != ''
)print
(halloffamelist)
#詞頻統計，用字典儲存，並按出現次數降序排序
myset =set(halloffamelist)
keylist =
valuelist =
for word in
myset:
wordcount =dict(zip(keylist, valuelist))
#字典排序函式(並取top20):
defsortdict(mydict):
templist =list()
for i in
mydict.items():
templist.sort(key=lambda x:x[1], reverse=true)
mydict = dict(templist[0:21])
return
mydict
wordcount =sortdict(wordcount)#輸出
print("
單詞 出現次數
".center(13))
for word in
wordcount.keys():
print(word.center(13),wordcount[word])

歌曲和**檔案見附件1

第四次作業

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