python join 和 split的常用使用方法

Will — Thu, 01 Aug 2013 11:49:56 +0000

python join 和 split方法的使用,join用来连接字符串，split恰好相反，拆分字符串的。

1.join用法示例

>>>li = ['my','name','is','bob']

>>>’ ‘.join(li)

‘my name is bob’

>>>’_’.join(li)

‘my_name_is_bob’

>>> s = ['my','name','is','bob']

>>> ‘ ‘.join(s)

‘my name is bob’

>>> ‘..’.join(s)

‘my..name..is..bob’

2.split用法示例

>>> b = ‘my..name..is..bob’

>>> b.split()

['my..name..is..bob']

>>> b.split(“..”)

['my', 'name', 'is', 'bob']

>>> b.split(“..”,0)

['my..name..is..bob']

>>> b.split(“..”,1)

['my', 'name..is..bob']

>>> b.split(“..”,2)

['my', 'name', 'is..bob']

>>> b.split(“..”,-1)

['my', 'name', 'is', 'bob']

可以看出 b.split(“..”,-1)等价于b.split(“..”)

The Townes » join和split