python第三次作业

列表，元组，字典，集合的遍历：

1.练习：

总结列表，元组，字典，集合的联系与区别。

列表，元组，字典，集合的遍历。

T1=('广州商学院')
print(T1)
for w in T1:
    print(w)
#集合的遍历
S1={1,2,3,4}
print(S1)
for e in S1:
    print(e)
#字典的遍历
di1 = {'y':30,'u':78,'o':40}
print(di1)
for d in di1:
    print(d,di1[d])

2.英文词频统计：

• 下载一首英文的歌词或文章str
• 分隔出一个一个的单词 list
• 统计每个单词出现的次数 dict

  　　

 

str1='''Well I wonder could it be
　　When I was dreaming about you baby
　　You were dreaming of me
　　Call me crazy
　　Call me blind
　　To still be suffering is stupid after all of this time

　　Did I lose my love to someone better
　　And does she love you like I do
　　I do, you know I really really do

　　Well hey
　　So much I need to say
　　Been lonely since the day
　　The day you went away

　　So sad but true
　　For me there's only you
　　Been crying since the day
　　the day you went away

　　I remember date and time
　　September twenty second
　　Sunday twenty five after nine
　　In the doorway with your case
　　No longer shouting at each other
　　There were tears on our faces

　　And we were letting go of something special
　　Something we'll never have again
　　I know, I guess I really really know

　　Why do we never know what we've got till it's gone
　　How could I carry on the day you went away
　　Cause I've been missing you so much I have to say'''
#歌曲中去掉空格
str1=str1.lstrip()
print(str1)
#把单词全部变成小写
a=str1.lower()
print(a)
#将歌词的每个单词分隔
strList=str1.split()
print(len(strList),strList)
#用set把字符串转换成集合
strSet=set(strList)
#计算每个单词出现的次数
for word in strSet:
   print(word,strList.count(word))

 

　　

 

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