I'm sorry. I didn't mean to offend you. I never thought your way was
inferior.
Justin Azoff wrote:
> [EMAIL PROTECTED] wrote:
> > I do appreciate the advice, but I've got a 12 line function that does
> > all of that. And it works! I just wish I understood a particular line
> > of it.
>
> You miss the point. The functions I posted, up until get_files_by_ext
> which is the equivalent of your getFileList, total 17 actual lines.
> The 5 extra lines give 3 extra features. Maybe in a while when you
> need to do a similar file search you will realize why my way is better.
>
> [snip]
> > The line I don't understand is:
> > reversed(range(len(dirnames)))
>
> This is why I wrote and documented a separate remove_hidden function,
> it can be tricky. If you broke it up into multiple lines, and added
> print statements it would be clear what it does.
>
> l = len(dirnames) # l is the number of elements in dirnames, e.g. 6
> r = range(l) # r contains the numbers 0,1,2,3,4,5
> rv = reversed(r) # rv contains the numbers 5,4,3,2,1,0
>
> The problem arises from how to remove elements in a list as you are
> going through it. If you delete element 0, element 1 then becomes
> element 0, and funny things happen. That particular solution is
> relatively simple, it just deletes elements from the end instead. That
> complicated expression arises because python doesn't have "normal" for
> loops. The version of remove_hidden I wrote is simpler, but relies on
> the even more obscure lst[:] construct for re-assigning a list. Both
> of them accomplish the same thing though, so if you wanted, you should
> be able to replace those 3 lines with just
>
> dirnames[:] = [d for d in dirnames if not d.startswith('.')]
>
>
> --
> - Justin
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