组合数据类型练习，英文词频统计实例

 1 work = list("1232122331231")
 2 print(work)
 3 
 4 work.append(‘3‘)
 5 print(work[-1])
 6 
 7 work.pop()
 8 print(work[-1])
 9 
10 work[-1] = 2
11 print(work[-1])
12 
13 print(work.index(‘3‘))
14 print(work.count(‘1‘))
15 print(work.count(‘3‘))

[‘1‘, ‘2‘, ‘3‘, ‘2‘, ‘1‘, ‘2‘, ‘2‘, ‘3‘, ‘3‘, ‘1‘, ‘2‘, ‘3‘, ‘1‘]
3
1
2
2
3
4

score = {1:‘44‘,
             2:‘66‘,
             3:‘78‘,
             4:‘67‘,
             5:‘88‘
            }
print(score)
score[6] = ‘98‘
print(score)
score[6] = ‘99‘
print(score)
score.pop(6)
print(score)

for i in score:
    print("{:>2} : {:<2}".format(i,score.get(i)))

{1: ‘44‘, 2: ‘66‘, 3: ‘78‘, 4: ‘67‘, 5: ‘88‘}
{1: ‘44‘, 2: ‘66‘, 3: ‘78‘, 4: ‘67‘, 5: ‘88‘, 6: ‘98‘}
{1: ‘44‘, 2: ‘66‘, 3: ‘78‘, 4: ‘67‘, 5: ‘88‘, 6: ‘99‘}
{1: ‘44‘, 2: ‘66‘, 3: ‘78‘, 4: ‘67‘, 5: ‘88‘}
 1 : 44
 2 : 66
 3 : 78
 4 : 67
 5 : 88

s=list(‘456132798‘)
t=set(‘4561327489‘)
c={‘小明‘:‘1‘,‘小红‘:‘3‘,‘小华‘:‘2‘}
x=(1, 2, 3, 4, 5 )
print(‘列表的遍历为:‘,end=‘‘)
for i in s:
    print(i,end=‘‘)
print()
print(‘元祖的遍历为:‘,end=‘‘)
for i in x:
    print(i,end=‘‘)
print()
print(‘字典key的遍历为:‘,end=‘‘)
for i in c:
    print(i,end=‘‘)
print()
print(‘字典value的遍历为:‘,end=‘‘)
for i in c.values():
    print(i,end=‘‘)
print()
print(‘数组的遍历为:‘,end=‘‘)
for i in x:
    print(i,end=‘‘)

列表的遍历为:456132798
元祖的遍历为:12345
字典key的遍历为:小明小红小华
字典value的遍历为:132
数组的遍历为:12345

s=‘‘‘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.!?‘‘‘
print("do出现次数",s.count(‘do‘))
s=s.replace(",","")
s=s.replace(‘.‘,‘‘)
s=s.replace(‘?‘,‘‘)
s=s.replace(‘!‘,‘‘)
s=s.replace(‘\n‘,‘‘)
s=s.lower()
s1=s.split(‘ ‘)
key=set(s1)
dic={}
for i in key:
    dic[i]=s.count(i)
wc=list(dic.items())
wc.sort(key=lambda x:x[1],reverse=True)
for i in range(10):
print(wc[i])