Python-列表转换字符串方法-jion

>>> S='spammy'
>>> L=list(S)
>>> L
['s', 'p', 'a', 'm', 'm', 'y']
>>> L[3]='x'
>>> L[4]='x'
>>> S=''.join(L)
>>> S
'spaxxy'



>>> '&'.join(['eggs','sauage','ham','toast'])
'eggs&sauage&ham&toast'