python-組合資料類

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列表：由字串建立一個作業評分列表，做增刪改查詢統計遍曆操作。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。

 s=list(‘kkkkk‘)s.insert(3,2)s.pop(3)s[6]=1print(s)print(‘第一個1的位置是：‘,s.index(‘1‘))x=0y=0for i in range(len(s)):    if s[i]==‘3‘:        x=x+1        if x==1:            y=iprint(‘三分個數為：‘,x,‘ ‘,‘第一個三分位置是：‘,y)print(‘二分個數為：‘,s.count(‘2‘))

字典：建立學生學號成績字典，做增刪改查遍曆操作。

>>> dic=dict(zip([1,2,3],[‘98‘,‘100‘,‘88‘]))>>> dic{1: ‘98‘, 2: ‘100‘, 3: ‘88‘}>>> dic2={4:‘95‘}>>> dic.update(dic2)>>> dic{1: ‘98‘, 2: ‘100‘, 3: ‘88‘, 4: ‘95‘}>>> dic.pop(2)‘100‘>>> dic{1: ‘98‘, 3: ‘88‘, 4: ‘95‘}

>>> dic{1: ‘120‘, 3: ‘88‘, 4: ‘95‘}>>> del dic[3]>>> dic{1: ‘120‘, 4: ‘95‘}>>> dic[1]=‘120‘>>> dic{1: ‘120‘, 3: ‘88‘, 4: ‘95‘}>>> dic{1: ‘98‘, 3: ‘88‘, 4: ‘95‘}>>> dic.get(4)‘95‘>>> dic.get(5,‘沒有‘)‘沒有‘

>>> dic[4]‘95‘>>> dic.keys()dict_keys([1, 3, 4])>>> dic.values()dict_values([‘98‘, ‘88‘, ‘95‘])>>> dic.items()dict_items([(1, ‘98‘), (3, ‘88‘), (4, ‘95‘)])dict

列表，元組，字典，集合的遍曆。

s=list(‘456132798‘)t=set(‘4561327489‘)c={‘小明‘:‘1‘,‘小紅‘:‘3‘,‘小華‘:‘2‘}x=(1, 2, 3, 4, 5 )print(‘列表的遍曆為:‘,end=‘‘)for i in s:    print(i,end=‘‘)print()print(‘元祖的遍曆為:‘,end=‘‘)for i in x:    print(i,end=‘‘)print()print(‘字典key的遍曆為:‘,end=‘‘)for i in c:    print(i,end=‘‘)print()print(‘字典value的遍曆為:‘,end=‘‘)for i in c.values():    print(i,end=‘‘)print()print(‘數組的遍曆為:‘,end=‘‘)for i in x:    print(i,end=‘‘)

 

 

‘‘‘下載一首英文的歌詞或文章，統計單詞出現的次數，將所有,.？！替換為空白格，將所有大寫轉換為小寫。‘‘‘sr=‘‘‘You‘re ?insecureDon‘t know what forYou‘re turning heads through the doorDon‘t need make-upto cover upBeing the way that you are is enoughEveryone else in the room can see itEveryone else but youBaby you light up my world like nobody elseThe way that you flip your hair gets me overwhelmedBut when you smile at the ground it ain‘t hard to tellYou don‘t know Oh ohYou don‘t know you‘re beautifulIf only you saw what I can seeYou‘ll understand why I want you so desperatelyRight now I‘m looking at you and I can‘t believeYou don‘t know Oh !ohYou don‘t know you‘re beautiful Oh ohThat‘s what makes you beautifulSo c-come onYou got it wrongTo prove I‘m ,right ‘‘‘print(sr.count(‘you‘))for i in sr:    sr=sr.replace(‘,‘,‘/t ‘)    sr=sr.replace(‘!‘,‘/t ‘)    sr=sr.replace(‘?‘,‘/t ‘)print(sr)for i in sr:    sr=sr.upper()print(sr)

 

python-組合資料類