Python中string.join()的用法

>>> a=”abcd”
>>> “,”.join(a)
‘a,b,c,d’
>>> “,”.join([‘a’,’b’,’c’])
‘a,b,c’
>>> “,”.join((‘a’,’b’,’c’))
‘a,b,c’
>>> “,”.join({‘a’:1,’b’:2,’c’:3})
‘a,c,b’

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