作业四

1.通过文件读取字符串 str

#读取文件
fo =open('bigworld.txt','r',encoding='utf-8')
big=fo.read().lower()
fo.close()
print(big)
#大小写
str.lower(big)
#标点符号
big=big.replace('.',' ')
#特殊符号
sep='.,;:?!-_'
for ch in sep:
    big=big.replace(ch,' ')
#字符串分隔
strList=big.split()
print(len(strList),strList)
#集合
strSet=set(strList)
exclude={'the','i'}
print(len(strSet),strSet)
#字典
strDict={}
for you in strSet:
    strDict[you]=strList.count(you)

print(len(strDict),strDict)
#列表
wcList=list(strDict.items())
print(wcList)
wcList.sort(key=lambda x:x[1],reverse=True)
print(wcList)
#top 20
for i in range(20):
    print(wcList[i]

2.

classmates=['Tracy','Bod','Tracy','李三','Tracy']

print(classmates)
classmates.sort()
print(classmates)

score=[85,90,50,60,95]
cs=dict(zip(classmates,score))
print(cs)
csList=list(cs.items())
print(csList)

def takeSecond(elem):
    x=elem[1]
    return x

csList.sort(key=takeSecond,reverse=True)
print(csList

 

3.

#英文小说

fo =open('blind.txt','r',encoding='utf-8')
bigg=fo.read().lower()
fo.close()
print(bigg)

#字符串分隔
strList=bigg.split()
print(len(strList),strList)
#集合
strSet=set(strList)
exclude={'the','i'}
print(len(strSet),strSet)
#字典
strDict={}
for you in strSet:
    strDict[you]=strList.count(you)

print(len(strDict),strDict)
#列表
wcList=list(strDict.items())
print(wcList)
wcList.sort(key=lambda x:x[1],reverse=True)
print(wcList)
#top 20
for i in range(20):
    print(wcList[i])

 

4.

#三国演义小说
import jieba

fo =open('bigbig.txt','r',encoding='utf-8')
biga=fo.read().lower()
fo.close()

print(biga)
print(jieba.cut(biga))
print(list(jieba.lcut(biga)))
print(list(jieba.cut(biga,cut_all=True)))
print(list(jieba.lcut_for_search(biga)))

sep = '.,;:?!-_。“”；、！，∶ '
for ch in sep:
    lines=biga.replace(ch, '')

biga = list(jieba.cut_for_search(biga))

strSet = set(biga)
    #print(len(strSet), strSet)

strDict = dict()
for word in strSet:
    strDict[word] = biga.count(word)
        #print(len(strDict), strDict)

wcList = list(strDict.items())
#print(wcList)
wcList.sort(key=lambda x: x[1], reverse=True)
#print(wcList)

for i in range(30):
    print(wcList[i])