>>> name=‘lizhanguo wangyuwei lixuehan‘

>>> a = name.split()

>>> a

[‘lizhanguo‘, ‘wangyuwei‘, ‘lixuehan‘]

>>> b = ‘,‘.join(a)   注：以逗号分隔

>>> b

‘lizhanguo,wangyuwei,lixuehan‘

>>> c = ‘ ‘.join(a)    注：以空格分隔

>>> c

‘lizhanguo wangyuwei lixuehan‘

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python 中join的使用