python123 第四次作业答案_python第四次作业

q = open('遇见.txt', 'r', encoding='utf-8').read()

wordsls = jieba.lcut(q)

wcdict = {}

for word in wordsls:

if len(word) == 1:

continue

else:

wcdict[word] = wcdict.get(word, 0) + 1

wcls = list(wcdict.items())

wcls.sort(key=lambda x: x[1], reverse=True)

print(wcls)

for i in range(7):

print(wcls[i])

#准备utf-8编码的文本文件，通过文件读取字符串str

fo=open('because of you.txt','r',encoding='utf-8')

stra = fo.read().lower()

fo.close()

print(stra)

sep=',.;!'

for ch in sep:

stra = stra.replace(ch,'')#进行预处理，清除掉sep中存在的标点符号

print(stra)

strList=stra.split('')

print(len(strList),strList)#分解提取单词，转化为列表list

strSet = set(strList)

print(len(strSet),strSet)#转化为集合

strDict={}

for world in strSet:

strDict[world] = strList.count(world)

print(len(strDict),strDict)#转化为字典，计算上一个集合中每个单词出现的次数

wcList=list(strDict.items())

print(wcList)#将字典中的目录转化为列表输出

wcList.sort(key=lambda x:x[1],reverse= True)

print(wcList) #按降序输出

e = {'a','the','an','and','i','or','of'}

strSet = strSet - e

print(len(strSet),strSet) #排除语法型词汇，代词、冠词、连词等无语义词

for i in range(20):

print(wcList[i]) #TOP20输出