On 5/8/07, gsmith <[EMAIL PROTECTED]> wrote:
> I don't understand what [\w-]{1,100} and [\w-]+ are doing. Can you
> please explain?
Your best bet is to consult a good reference on regular expressions;
they're among the topics that "every programmer needs to understand".
Jeffrey Friedl's book "Mastering Regular Expressions" is by far the
best reference out there, but the documentation for Python's
regular-expression module also contains a summary of the syntax:
http://docs.python.org/lib/re-syntax.html
In short, '\w' is a special sequence meaning "any letter or any number
or an underscore"; '[-\w-]' is character class combining '\w' and a
hyphen (so any character which is a hyphen, or any character which
matches '\w' will match it), and the '+' means "match one or more
things like this in a sequence". '\d' means "any digit".
Numbers in braces specify an exact number or range of reptitions;
'\d{3}' means "any sequence of three consecutive digits", while '\d{2,
4}' means "any sequence of between two and four consecutive digits".
--
"Bureaucrat Conrad, you are technically correct -- the best kind of correct."
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