英文词频统计预备，组合数据类型练习

s=‘‘‘One night to be confused
One night to speed up truth
We had a promise made
four hands and then away
Both under influence
we had demons in
To know what to say
Mind is a razorblade
To call for hands of above
to lean on
Wouldn‘t be good enough
for me, no
One night of magic truth
The start of simple truth
One night to push and scream
and then relief
Ten days of perfect tunes
The colors red and blue
We had a promise made
we were in love
To call for hands of above
to lean on
Wouldn‘t be good enough
for me, no
To call for hands of above
to lean on
Wouldn‘t be good enough
for me, no
And you
you knew the hand of a devil
And you
kept us away with wolf teeths
sharing different heartbeats
in one night
To call for hands of above
to lean on
Wouldn‘t be good enough
for me, no
To call for hands of above
to lean on
Wouldn‘t be good enough‘‘‘
r=s.lower()
for i in ‘,.?!‘:
    r=r.replace(i,‘ ‘)

print(‘to出现的次数：‘+str(r.count(‘to‘)))
print(‘good出现的次数：‘+str(r.count(‘good‘)))

r=r.split(‘ ‘)
print(r)

s=list(‘231112232312‘)
print(s)
s.append(‘3‘) 
s.pop(1)    
s.insert(1,2)
print(‘经过增删改之后的作业评分列表：‘,s)
print(‘第一个3分的下标：‘,s.index(‘3‘))
print(‘1分的同学个数：‘,s.count(‘1‘))
print(‘3分的同学个数：‘,s.count(‘3‘))