python 正则表达式 截取特定字符串之后的全部内容

比较经典的：

>>> import re
>>> re.findall('(?<=com/).*$', "www.example.com/thedubaimall")
['thedubaimall']
>>> re.findall('(?<=com).*$', "www.example.com/thedubaimall")
['/thedubaimall']