In [4]: import re
In [5]: re.findall(r"\d+","jjj1234mm222")
Out[5]: [‘1234‘, ‘222‘]
In [6]: re.findall(r"\d+","jjj1234")
Out[6]: [‘1234‘]
In [18]: import re
In [19]: re.match(r"^#","#jjj")
Out[19]: <_sre.SRE_Match at 0x7fd89c9af370>
In [20]: re.match(r"^#","jjj")
原文：http://www.cnblogs.com/xiaojikuaipao/p/6285606.html