组合数据类型练习，英文词频统计实例

score=list(‘21223113321‘)
print(‘作业评分列表:‘,score)
score.append(‘3‘)
print(‘增加：‘,score)
score.pop()
print(‘删除：‘,score)
score.insert(2,‘1‘)
print(‘插入：‘,score)
score[2]=‘2‘
print(‘修改：‘,score)
print(‘第一个3分的下标：‘,score.index(‘3‘))
print(‘1分的个数：‘,score.count(‘1‘))
print(‘3分的个数：‘,score.count(‘3‘))

>>> k={‘201406114326‘:‘3‘,‘201406114327‘:‘2‘,‘201406114328‘:‘1‘,‘201406114329‘:‘0‘}
>>> k[‘201406114326‘]
‘3‘
>>> k.pop(‘201406114327‘)
‘2‘
>>> k
{‘201406114326‘: ‘3‘, ‘201406114328‘: ‘1‘, ‘201406114329‘: ‘0‘}
>>> k.keys()
dict_keys([‘201406114326‘, ‘201406114328‘, ‘201406114329‘])
>>> k.values()
dict_values([‘3‘, ‘1‘, ‘0‘])
>>> k.items()
dict_items([(‘201406114326‘, ‘3‘), (‘201406114328‘, ‘1‘), (‘201406114329‘, ‘0‘)])
>>> k.get(‘201406114326‘)
‘3‘
>>> k.get(‘201406114327‘,‘无结果‘)
‘无结果‘
>>>

ls=list("abcdefghijklmnopqrstuvwxyz")
tu=tuple("abcdefghijklmnopqrstuvwxyz")
di={‘语文‘:1,"数学":2,"英语":3,"物理":4,"化学":5,"生物":6}
se=set("123131321")
for i in tu:
    print(i)

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])