作业3

def music(n):
    a=n.lower()
    a=a.strip()
    for i in ‘‘‘,.!?;‘‘‘:
        a=a.replace(i,‘ ‘)
    a=a.split()
    dic={}
    for j in set(a):
        dic[j] = a.count(j)
    li = list(dic.items())
    print(li)
    return


if __name__ == ‘__main__‘:
    str=‘‘‘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‘‘‘
    music(str)

[(‘is‘, 2), (‘believe‘, 2), (‘forever‘, 1), (‘to‘, 2), (‘more‘, 2), (‘life‘, 1), (‘till‘, 1), (‘stay‘, 1), (‘wherever‘, 2), (‘way‘, 1), (‘loved‘, 1), (‘one‘, 3), (‘in‘, 5), (‘there‘, 1), (‘true‘, 1), (‘safe‘, 1), (‘time‘, 2), (‘can‘, 1), (‘always‘, 1), (‘a‘, 1), (‘my‘, 9), (‘across‘, 1), (‘us‘, 2), (‘have‘, 1), (‘come‘, 1), (‘far‘, 3), (‘dreams‘, 1), (‘spaces‘, 1), (‘hold‘, 1), (‘fear‘, 1), (‘see‘, 1), (‘distance‘, 1), (‘know‘, 2), (‘go‘, 11), (‘door‘, 2), (‘never‘, 1), (‘feel‘, 1), (‘for‘, 1), ("there‘s", 1), (‘how‘, 1), ("we‘re", 1), (‘was‘, 1), (‘are‘, 3), (‘away‘, 1), (‘between‘, 1), (‘will‘, 5), (‘love‘, 3), ("you‘re", 3), (‘last‘, 1), (‘let‘, 1), (‘the‘, 5), (‘open‘, 2), (‘you‘, 11), ("we‘ll", 2), (‘some‘, 1), (‘heart‘, 9), (‘that‘, 5), (‘show‘, 1), (‘nothing‘, 1), (‘not‘, 1), (‘this‘, 1), (‘on‘, 12), (‘does‘, 2), (‘touch‘, 1), (‘here‘, 3), (‘when‘, 1), (‘i‘, 9), (‘lifetime‘, 1), (‘every‘, 1), (‘night‘, 1), (‘once‘, 2), (‘near‘, 2), (‘and‘, 12)]

classmates=[‘Michael‘,‘Bob‘,‘Tracy‘,‘李三‘,‘Tracy‘,56]
print(classmates)
a=classmates[1]     
print("取元素片段:"+a)
b=classmates[-1]        
print(b)
print(classmates[1:3]) 
f=len(classmates)      
print(f)
c=classmates.index(‘Tracy‘)   
print(c)
d=classmates[1]=‘Sarah‘   
print("修改为:"+d)
e=classmates.count(‘Tracy‘)  
print(e)
print(classmates)
h=classmates.insert(2,"Jack")   
print(h)
print(classmates)
i=classmates.append("Adam")    
print(i)
print(classmates)
j=classmates.pop(1)   
print(j)
print(classmates)

修改为:Sarah
2
[‘Michael‘, ‘Sarah‘, ‘Tracy‘, ‘李三‘, ‘Tracy‘, 56]
None
[‘Michael‘, ‘Sarah‘, ‘Jack‘, ‘Tracy‘, ‘李三‘, ‘Tracy‘, 56]
None
[‘Michael‘, ‘Sarah‘, ‘Jack‘, ‘Tracy‘, ‘李三‘, ‘Tracy‘, 56, ‘Adam‘]
Sarah
[‘Michael‘, ‘Jack‘, ‘Tracy‘, ‘李三‘, ‘Tracy‘, 56, ‘Adam‘]

c1=(‘Micheal‘,‘Bob‘,‘Tracy‘,‘李三‘,‘Tracy‘,56)
print(len(c1))   
a=tuple(‘abcde‘)  
print(a)

6
(‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘)

classmates=[‘Michael‘,‘Bob‘,‘Tracy‘]
scores=[65,75,85]
d={‘Bob‘:75,"Michael":65,‘Tracy‘:85}
print(d[‘Michael‘])  
print(len(d))   
‘Thomas‘ in d 
d[‘Rose‘]=88 
print(d.pop(‘Bob‘))
print(d.keys())   
print(d.values()) 
print(d.items())

65
3
75
dict_keys([‘Michael‘, ‘Tracy‘, ‘Rose‘])
dict_values([65, 85, 88])
dict_items([(‘Michael‘, 65), (‘Tracy‘, 85), (‘Rose‘, 88)])

s={1,2,3}
s.add(4)
s.remove(3)
print(s)
 
s=set([1,1,2,2,3,4])  
print(s)
s1= set([1,2,3])
s2= set([2,3,4])
print(s1,s2)
 
print(s1 & s2) 
print(s1 | s2) 
print(s2 - s1) 

{1, 2, 4}
{1, 2, 3, 4}
{1, 2, 3} {2, 3, 4}
{2, 3}
{1, 2, 3, 4}
{4}