a string problem
johnjsal at NOSPAMgmail.com
Tue Jun 13 16:26:32 CEST 2006
micklee74 at hotmail.com wrote:
> just curious , if RE has the \b and it works, can we look into the
> source of re and see how its done for \b ?
I had a look in the sre module (which re seems to import), but I
couldn't find much. I'm not the best at analyzing source code, though. :)
What is it you want to know about \b? It searches for the empty string
before and after a word (word being an alphanumeric character that can
A little more specific info is in the docs:
Matches the empty string, but only at the beginning or end of a word. A
word is defined as a sequence of alphanumeric or underscore characters,
so the end of a word is indicated by whitespace or a non-alphanumeric,
non-underscore character. Note that \b is defined as the boundary
between \w and \ W, so the precise set of characters deemed to be
alphanumeric depends on the values of the UNICODE and LOCALE flags.
Inside a character range, \b represents the backspace character, for
compatibility with Python's string literals.
More information about the Python-list