1. list 去除重复
http://python.u85.us/viewnews-6.html
l1 = ['b','c','d','b','c','a','a']
l2 = []
[l2.append(i) for i in l1 if not i in l2]
print l2
2.中文gbk字符 正则匹配
re.findall(r'<SO>[\x80-\xff]{0,10}</SO>',line)
3. string int 互转
str(a)
int(b)
4. 四舍五入
http://shanchao7932297.blog.163.com/blog/static/13636242010101643316187/
python 浮点类型 保留位数
>>> round(1.2) -> 1.0
>>> round(1.5) -> 2.0
>>> round(1.511,1) -- > round(1.5)
5.代码里有中文
# coding=gb2312
6. 传入系统参数
id =str(sys.argv[1])
7. python调用exe
os.system('notepad.exe')