1.列表實例：由字符串創建一個作業評分列表，做增刪改查詢統計遍歷操作。例如，查詢第一個3分的下標，統計1分的同學有多少個，3分的同學有多少個等。

>>> ls=list(‘1231323232323131323‘)
>>> ls
[‘1‘, ‘2‘, ‘3‘, ‘1‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘1‘, ‘3‘, ‘1‘, ‘3‘, ‘2‘, ‘3‘]
>>> ls.append(‘4‘)
>>> ls.append(‘5‘)
>>> ls
[‘1‘, ‘2‘, ‘3‘, ‘1‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘1‘, ‘3‘, ‘1‘, ‘3‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘]
>>> ls.pop()
‘5‘
>>> ls
[‘1‘, ‘2‘, ‘3‘, ‘1‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘2‘, ‘3‘, ‘1‘, ‘3‘, ‘1‘, ‘3‘, ‘2‘, ‘3‘, ‘4‘]

>>> ls.index(‘3‘)
2
>>> ls.count(‘1‘)
4
>>> ls.count(‘3‘)
9
>>> 

2.字典實例：建立學生學號成績字典，做增刪改查遍歷操作。

>>> d={‘01‘:‘95‘,‘02‘:‘85‘,‘03‘:‘90‘,‘04‘:‘92‘,‘05‘:‘72‘,‘06‘:‘93‘}
>>> d.keys()
dict_keys([‘01‘, ‘02‘, ‘03‘, ‘04‘, ‘05‘, ‘06‘])
>>> d.values()
dict_values([‘95‘, ‘85‘, ‘90‘, ‘92‘, ‘72‘, ‘93‘])
>>> d.get(‘03‘,‘100‘)
‘90‘
>>> d[‘99‘]=‘99‘
>>> d
{‘01‘: ‘95‘, ‘02‘: ‘85‘, ‘03‘: ‘90‘, ‘04‘: ‘92‘, ‘05‘: ‘72‘, ‘06‘: ‘93‘, ‘99‘: ‘99‘}

3.列表，元組，字典，集合的遍歷。總結列表，元組，字典，集合的聯系與區別。

>>> l=list(‘123456665432145‘)
>>> t=tuple(‘65432566123333‘)
>>> d={‘01‘:‘劉‘,‘02‘:‘張‘,‘03‘:‘王‘,‘04‘:‘李‘}
>>> s=set(‘123654598777296582‘)
>>> l
[‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘6‘, ‘6‘, ‘5‘, ‘4‘, ‘3‘, ‘2‘, ‘1‘, ‘4‘, ‘5‘]
>>> 
>>> t
(‘6‘, ‘5‘, ‘4‘, ‘3‘, ‘2‘, ‘5‘, ‘6‘, ‘6‘, ‘1‘, ‘2‘, ‘3‘, ‘3‘, ‘3‘, ‘3‘)
>>> 
>>> d
{‘01‘: ‘劉‘, ‘02‘: ‘張‘, ‘03‘: ‘王‘, ‘04‘: ‘李‘}
>>> 
>>> s
{‘8‘, ‘2‘, ‘7‘, ‘9‘, ‘1‘, ‘3‘, ‘6‘, ‘5‘, ‘4‘}
>>> 

列表使用方括號，元組使用小括號，字典使用花括號，集合使用[()]；

元組創建很簡單，只需要在括號中添加元素，並使用逗號隔開即可，列表則復雜多；

列表、字典、集合能增加、修改、刪除，元組不能；

4.英文詞頻統計實例

new = ‘‘‘An empty street An empty house 
A hole inside heart  all alone and the rooms 
Are getting smaller 
I wonder how I wonder why 
I wonder where they are 
The days we had 
The songs we sang together 
And oh! my love  holding on forever 
Reaching for a love 
That seems so far 
So I say a litter prayer 
No my dream will take me there 
Where the skies are blue to see you 
once again my love 
Overseas from coast to coast 
Find a place I love the most 
Where the fields are green 
To see you once again 
My love 
I Try to read I go to work  laughing with my friends 
But I can‘t stop to keep myself 
From thinking 
I wonder how I wonder why 
I wonder where they are 
The days we had 
The songs we sang togetther 
And oh! my love 
I‘mholding on forever 
Reaching for a love 
That seems so far 
So I say a litter prayer 
No my dream will take me there 
Where the skies are blue to see you 
once again my love 
Overseas from coast to coast 
Find a place I love the most 
Where the fields are green 
To see you once again 
To hold you in my arms 
To promise my love 
To tell you from my heart 
You are all I‘m thinking of 

Reaching for a love 
That seems so far 
So I say a litter prayer 
No my dream will take me there 
Where the skies are blue to see you 
once again my love 
Overseas from coast to coast 
Find a place I love the most 
Where the fields are green 
To see you once again 
My love 
And hope my dream will take me there 
Where the skies are blue to see you 
once again my love 
Overseas from coast to coast 
Find a place I love the most 
Where the fields are green 
To see you once again 
My love‘‘‘

new=new.lower() 
for i in ‘.,"‘:
    new=new.replace(i,‘ ‘)
word = new.split(‘ ‘) 
dic ={}
keys = set(word)
for i in keys:
    dic[i]=word.count(i)
words = list(dic.items())
words.sort(key= lambda x:x[1],reverse = True)
for i in range(10):
    print(word[i])

組合數據類型和英文詞頻統計實例