python 按照固定长度分割字符串的方法

#!/bin/python

#

import re

A = open('mac.txt','r')

a = A.readlines()

for aa in a:

 b=re.findall(r'.{2}',aa)

 c='-'.join(b)

 print c

A.close()

def cut_text(text,lenth):

 textArr = re.findall('.{'+str(lenth)+'}', text)

 textArr.append(text[(len(textArr)*lenth):])

 return textArr

print(cut_text('123456789abcdefg',3))

['123', '456', '789', 'abc', 'def', 'g']

>>> import re

>>> string = '123456789abcdefg'

>>> re.findall(r'.{3}', string)

['123', '456', '789', 'abc', 'def']

>>>