1.

d={'001':'88','002':'84','003':'89','004':'86','005':'82'}

>>> d['002']

'84'

>>> d.get('003')

SyntaxError: unexpected indent

>>> d.get('003')

'89'

>>> d.pop('003')

'89'

>>> d.get('003')

>>> print(d.get('003'))

None

>>> d

{'001': '88', '002': '84', '004': '86', '005': '82'}

>>> d.keys()

dict_keys(['001', '002', '004', '005'])

>>> d.values()

dict_values(['88', '84', '86', '82'])

>>> d.items()

dict_items([('001', '88'), ('002', '84'), ('004', '86'), ('005', '82')])

2.

s=list('2347555544')

tu=tuple('9876687879')

print(ls)

print(tu)

dc=dict(zip(ls,tu))

print(dc)

print('ls遍历\n') 

for i in ls:

print(i)

print('tu遍历\n') 

for i in tu:

print(i)

print('dict遍历\n') 

for i in dc:

print(i,dc[i])

列表里面的数据是可变的，可增删改插。但是元组里面的数据是不可变的，只可增，不可删改,字典的查找与插入速度快，但是占用内存，浪费多，不能排序；集合不能重复，不存储values,创建集合需要提供一个列表作为输入集合。

3.s='''every night in my dreams 

i see you, i feel you,

that is how i know you go on 

far across the distance 

and spaces between us 

you have come to show you go on 

near, far, wherever you are 

i believe that the heart does go on 

once more you open the door 

and you're here in my heart 

and my heart will go on and on 

love can touch us one time 

and last for a lifetime 

and never let go till we're one 

love was when i loved you 

one true time i hold to 

in my life we'll always go on 

near, far, wherever you are 

i believe that the heart does go on 

once more you open the door 

and you're here in my heart 

and my heart will go on and on 

there is some love that will not go away 

you're here, there's nothing i fear,

and i know that my heart will go on 

we'll stay forever this way 

you are safe in my heart 

and my heart will go on and on

'''

s=s.lower()

s=s.replace('\n',' ')

word=s.split(' ')

dic={}

keys=set(word)

for i in keys:

dic[i]=word.count(i)

print(dic)