第三次作业

1、组合数据类型的区别：
列表：用"[]"创建每个元素之间用","隔开;是一种有序的序列,正向递增,反向递减序号,元素类型可以不一样,可以随时增加或删除元素.
元组：用"()"创建每个元素之间用","隔开;也可以进行索引,但是一旦创建了就不能修改里面的元素,不能删除其中的一个元素,用del可以删除整个元组:
字典：用"{}"创建每个键值对对之间用","隔开;键值队中键是唯一的,值可以取任何数据类型，不允许相同的键出现两次.
集合：用"{}"或者是set来创建，是无序不重复的序列,用remove来删除指定的元素


2、列表，元组，字典，集合的遍历：

#列表的遍历
myList=["小红","小李",80,90]
print("列表的遍历：")
for l1 in myList:
    print(l1)
#元组的遍历
myTuple=(23,65,79,50)
print("元组的遍历：")
for T1 in myTuple:
    print(T1)
#集合的遍历
mySet={43,58,90,74}
print("集合的遍历：")
for S1 in mySet:
    print(S1)
#字典的遍历
classmate=["张三","李四","小虎"]
sorce=[89,76,90]
d={}
print("字典的遍历：")
d=dict(zip(classmate,sorce))
for i in d.keys():
    print(i,d[i])

英文词频统计：

#英文歌词：
str1='''I will not make the same mistakes that you did 
I will not let myself cause my heart so much misery 
I will not break the way you did 
You fell so hard 
I learned the hard way, to never let it get that far 
-
Because of you 
I never stray too far from the sidewalk 
Because of you 
I learned to play on the safe side 
So I don't get hurt 
Because of you 
I find it hard to trust 
Not only me, but everyone around me 
Because of you 
I am afraid 
-
I lose my way 
And it's not too long before you point it out 
I cannot cry 
Because I know that's weakness in your eyes 
I'm forced to fake a smile, a laugh 
Every day of my life 
My heart can't possibly break 
When it wasn't even whole to start with 
-
Because of you 
I never stray too far from the sidewalk 
Because of you 
I learned to play on the safe side 
So I don't get hurt 
Because of you 
I find it hard to trust 
Not only me, but everyone around me 
Because of you 
I am afraid 
-
I watched you die 
I heard you cry 
Every night in your sleep 
I was so young 
You should have known better than to lean on me 
You never thought of anyone else 
You just saw your pain 
And now I cry 
In the middle of the night 
Over the same damn thing 
-
Because of you 
I never stray too far from the sidewalk 
Because of you 
I learned to play on the safe side so I don't get hurt 
Because of you 
I tried my hardest just to forget everything 
Because of you 
I don't know how to let anyone else in 
Because of you 
I'm ashamed of my life because it's empty 
Because of you 
I am afraid 
-
Because of you'''
#把单词全部变成小写
s1=str1.lower()
print(s1)
#去掉空格
str1=str1.lstrip()
print(str1)
#将歌词的每个单词分隔组成列表形式
print("将歌词的每个单词分隔组成列表形式:")
strList=str1.split()
print(strList)
#计算单词出现的次数
print("计算单词出现的次数:")
strSet=set(strList)
for word in strSet:
   print(word,strList.count(word))

 

转载于:https://www.cnblogs.com/zxcv11/p/9686054.html