[Tutor] re module- puzzling results when matching money

[Albert-Jan Roskam]

----- Original Message -----

> From: Alex Kleider <akleider at sonic.net>
> To: Albert-Jan Roskam <fomcl at yahoo.com>
> Cc: Python Tutor <tutor at python.org>
> Sent: Sunday, August 4, 2013 1:34 AM
> Subject: Re: [Tutor] re module- puzzling results when matching money
> 
> On 2013-08-03 13:30, Albert-Jan Roskam wrote:
> 
> 
>>  Word boundary.  This is a zero-width assertion that matches only at the
>>  beginning or end of a word.  A word is defined as a sequence of 
>>  alphanumeric
>>  characters, so the end of a word is indicated by whitespace or a
>>  non-alphanumeric character.[http://docs.python.org/2/howto/regex.html]
>>  So I think it's because a dollar sign is not an alphanumeric character.
> 
> I get it now, thanks.
> 
> 
>> 
>>>>>  re.findall(r"\b\e\b", "d e f")
>                      ^
> I'm puzzled by the presence of the '\' character before the 
> 'e' above.

sorry, my bad. I forgot to delete that backslash, I meant   re.findall(r"\be\b", "d e f"). Same with the other example.