[Tutor] escape character regex

[Peter Otten]

Ian D wrote:

> Ok I got it.
> 
> pchars = re.compile(b'\x00\x00\x00[\0-\xff]')
> 
> preceeding b and [0-\xff]

Also possible:

re.compile(b"\0\0\0.", re.DOTALL)

. by default means "any byte except \n", the re.DOTALL flag changes that to 
"any byte".

or

re.compile(b"\0{3}.", re.DOTALL)

{3} means "repeat 3 times".