ConfigParser模块:
#!/sur/bin/env python # -*- coding:utf-8 -*- __author__ = 'ganzl' import ConfigParser config = ConfigParser.ConfigParser() config.read('i.cfg') secs = config.sections() print 'sections:',secs options = config.options('group2') print 'options:',options item_list = config.items('group2') print 'item:',item_list for k,v in item_list: print k,v i.cfg: [section1] k1 = v1 k2:v2 [section2] host = 1.0.0.1 [group2] gan : 123 host1 = 2.0.0.2 host2 = 3.0.0.3 [111] a : b 作用:对同一模块的服务器进行批量命令操作: python python_cmd.py group2 'ifconfig'
递归小demo:
#!/sur/bin/env python # -*- coding:utf-8 -*- __author__ = 'ganzl' def func(arg1,arg2,times): times += 1 count = arg1+arg2 if count>1000: return count ret = func(arg2,count,times) #return func(arg2,count,times) print ret,times-1 ret = func(0,1,1) print ret
#!/sur/bin/env python # -*- coding:utf-8 -*- __author__ = 'ganzl' def func(arg1,arg2,times): times += 1 count = arg1+arg2 if count>1000: return count #ret = func(arg2,count,times) return func(arg2,count,times) #print ret,times-1 ret = func(0,1,1) print ret 比较下这两个小demo。类似这个递归,其他源码经常看到
re:
字符:
. 匹配除换行符以外的任意字符
w 匹配字母或数字或下划线或汉字
s 匹配任意的空白符
d 匹配数字
匹配单词的开始或结束
^ 匹配字符串的开始
$ 匹配字符串的结束
次数:
* 重复零次或更多次
+ 重复一次或更多次
? 重复零次或一次
{n} 重复n次
{n,} 重复n次或更多次
{n,m} 重复n到m次
IP: ^(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3}$ 手机号: ^1[3|4|5|8][0-9]d{8}$
#!/sur/bin/env python # -*- coding:utf-8 -*- __author__ = 'ganzl' import re #以加减乘除或者单独除进行切割 content = "'1 - 2 * ((60-30+1*(9-2*5/3+7/3*99/4*2998+10*568/14))-(-4*3)/(16-3*2) )'" new_content1 = re.split('[+-*/]+', content) new_content2 = re.split('*', content, 1) print 'new_content1',new_content1 print 'new_content2',new_content2 #将空格去掉,并以(加减乘除数字重复一次的形式)切割 inpp = '1-2*((60-30 +(-40-5)*(9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2))' inpp = re.sub('s*','',inpp) new_content3 = re.split('(([+-*/]?d+[+-*/]?d+){1})', inpp) print 'new_content3:',new_content3 #截取格式:(加减乘除数字,带小数,重复两次以上的形式)切割 inpp = '1 - 2 * ( (60-30 +(-40.0/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) ) ' inpp = re.sub('s*','',inpp) content = re.search('(([+-*/]*d+.*d*){2,})', inpp).group() before, ret, after = re.split('(([+-*/]*d+.*d*){2,})',inpp,1) print 'content',content print 'before:',before print 'ret:',ret print 'after:',after 上面用到sub/split方法。 还有其他方法(下次用到时再实践下就好) obj = re.match('d+', '123uuasf') obj = re.search('d+', 'u123uu888asf') re.search("([0-9]*)([a-z]*)([0-9]*)", a).group() obj = re.findall('d+', 'fa123uu888asf')
看高人用正则跟递归写的计算器:
http://www.cnblogs.com/wupeiqi/articles/4949995.html