python 中join的使用
>>> 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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