Python中join的简单用法

Python中join的简单用法

join是可以把列表转化成字符串的

如:

>>> r
['a', 'b', 'c', 'd', 'f', 'a']
>>> s = ''.join(r)
>>> s
'abcdfa'

>>> a='12345'

>>> b='-'
>>> b.join(a)
'1-2-3-4-5'
>>> a=[1,2,3,4,5]
>>> b.join(a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence item 0: expected string, int found
>>> a=['1','2','3','4','5']
>>> b.join(a)
'1-2-3-4-5'
>>> b='*'
>>> b.join(a)
'1*2*3*4*5'
>>>