Using filepath method to identify an .html page

Ferrous Cranus nikos.gr33k at gmail.com
Tue Jan 22 15:55:04 CET 2013


Τη Τρίτη, 22 Ιανουαρίου 2013 4:33:03 μ.μ. UTC+2, ο χρήστης Chris Angelico έγραψε:
> On Wed, Jan 23, 2013 at 12:57 AM, Ferrous Cranus <nikos.gr33k at gmail.com> wrote:
> 
> > Τη Τρίτη, 22 Ιανουαρίου 2013 3:04:41 μ.μ. UTC+2, ο χρήστης Steven D'Aprano έγραψε:
> 
> >
> 
> >> What do you expect int("my-web-page.html") to return? Should it return 23
> 
> >> or 794 or 109432985462940911485 or 42?
> 
> >
> 
> > I expected a unique number from the given string to be produced so i could have a (number <=> string) relation. What does int( somestring ) is returning really? i don;t have IDLE to test.
> 
> 
> 
> Just run python without any args, and you'll get interactive mode. You
> 
> can try things out there.
> 
> 
> 
> > This counter.py will work on a shared hosting enviroment, so absolutes paths are BIG and expected like this:
> 
> >
> 
> > /home/nikos/public_html/varsa.gr/articles/html/files/index.html
> 
> 
> 
> That's not big. Trust me, modern databases work just fine with unique
> 
> indexes like that. The most common way to organize the index is with a
> 
> binary tree, so the database has to look through log(N) entries.
> 
> That's like figuring out if the two numbers 142857 and 857142 are the
> 
> same; you don't need to look through 1,000,000 possibilities, you just
> 
> need to look through the six digits each number has.
> 
> 
> 
> > 'pin' has to be a number because if i used the column 'page' instead, just imagine the database's capacity withholding detailed information for each and every .html requested by visitors!!!
> 
> 
> 
> Not that bad actually. I've happily used keys easily that long, and
> 
> expected the database to ensure uniqueness without costing
> 
> performance.
> 
> 
> 
> > So i really - really need to associate a (4-digit integer <=> htmlpage's absolute path)
> 
> 
> 
> Is there any chance that you'll have more than 10,000 pages? If so, a
> 
> four-digit number is *guaranteed* to have duplicates. And if you
> 
> research the Birthday Paradox, you'll find that any sort of hashing
> 
> algorithm is likely to produce collisions a lot sooner than that.
> 
> 
> 
> > Maybe it can be done by creating a MySQL association between the two columns, but i dont know how such a thing can be done(if it can).
> 
> >
> 
> > So, that why i need to get a "unique" number out of a string. please help.
> 
> 
> 
> Ultimately, that unique number would end up being a foreign key into a
> 
> table of URLs and IDs. So just skip that table and use the URLs
> 
> directly - much easier. In this instance, there's no value in
> 
> normalizing.
> 
> 
> 
> ChrisA

I insist, perhaps compeleld, to use a key to associate a number to a filename.
Would you help please?

I dont know this is supposed to be written. i just know i need this:

number = function_that_returns_a_number_out_of_a_string( absolute_path_of_a_html_file)

Would someone help me write that in python coding? We are talkign 1 line of code here....



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