字符串按每3个字符分割
# encoding: utf-8'''有字符串 'XXXxxxXXXxxxXXXxxxXXXxxxXXX'， 要求把该字符串按每3个字符分割, 返回一个列表。'''import res = 'XXXxxxXXXxxxXXXxxxXXXxxxXXX'def slice_string_1(org_str, step): # 实现1 return [org_str[i: i+step] for i in xrange(0, len(org_str), step)]def slice_string_2(org_str, step): # 实现2 return re.findall('.{%s}' % step, org_str)if __name__ == '__main__': ''' result: ['XXX', 'xxx', 'XXX', 'xxx', 'XXX', 'xxx', 'XXX', 'xxx', 'XXX'] ['XXX', 'xxx', 'XXX', 'xxx', 'XXX', 'xxx', 'XXX', 'xxx', 'XXX'] ''' step = 3 print slice_string_1(s, step) print slice_string_2(s, step)?