Python 疑难问题-解决方法

import re

a = 'I HATE  WHAT   I   I      LOVE   '
a = re.sub('\s+', '', a).strip()
print(a)

import re
a = 'hello world'
strinfo = re.compile()
strinfo = re.compile(' ')
b = strinfo.sub('', a)
print(b)

a = ''.join(a.split())
print(a)