what would be the regular expression for null byte present in a string

Tue Jan 13 09:41:51 EST 2015

Shambhu Rajak wrote:
> I have a string that I get as an output of a command as:
>'\x01\x00\x00\x00\x00\x00\x00\x00\x0c\x00\x00\x0010232ae8944a\x02\x00\x00\x00\x00\x00\x00\x00\n'
>> I want to fetch '10232ae8944a' from the above string.
>> I want to find a re pattern that could replace all the \x01..\x0z to be
> replace by empty string '', so that I can get the desired portion of
> string
>> Can anyone help me with a working regex for it.

I think you want the str.tranlate() method rather than a regex. 
Assuming you are using Python 2:
>>> delenda = "".join(map(chr, range(32)))
>>> identity = "".join(map(chr, range(256)))
>>>'\x01\x00\x00\x00\x00\x00\x00\x00\x0c\x00\x00\x0010232ae8944a\x02\x00\x00\x00\x00\x00\x00\x00\n'.translate(identity, 
delenda)
'10232ae8944a'
With Python3:
>>> mapping = dict.fromkeys(range(32))
>>>'\x01\x00\x00\x00\x00\x00\x00\x00\x0c\x00\x00\x0010232ae8944a\x02\x00\x00\x00\x00\x00\x00\x00\n'.translate(mapping)
'10232ae8944a'