英文词频统计预备，组合数据类型练习

str=‘‘‘It took a spark and my heart was energized.Electrocute like a hot live wire.
I looked away cause her eyes will hypnotize.An attitude that can start a fire.
Baby your love‘s a phenomena.Tower of love rising higher higher.Gotta g-get a thermometer.
Running a fever like I‘m on fire.Baby it‘s a miracle.Something more than physical.
Flow of attraction.Refraction tonight!Running with the devil.Hot like heavy metal.Power me like a BATTERY!
I‘m flying like an eagle.Sharper than a needle.Charge me up cause I need your love!
Let‘s get Higher Higher.Your love‘s like a Battery.Let‘s get Higher Higher.‘‘‘

for i in ‘,.?!‘:
    str=str.replace(i,‘ ‘)
print(‘将所有,.？！等替换为空格:‘,str,‘\n‘)

str=str.lower()
print(‘所有转换为小写：‘,str,‘\n‘)

count=str.count(‘higher‘)
print(‘单词higher出现的次数:‘,count,‘\n‘)

str=str.split(‘ ‘)
print(‘分隔单词：‘,str)

str=list(‘1231221321223133‘)
print(str)

print(‘第一个3分的下标为：‘,str.index(‘3‘))

print(‘1分的同学有：‘,str.count(‘1‘))

print(‘3分的同学有：‘,str.count(‘3‘))

str[2]=‘1‘
print(‘修改后为:‘,str)