cannot concatenate 'str' and 'list' objects

[Νικόλαος Κούρας]

Τη Σάββατο, 15 Σεπτεμβρίου 2012 3:34:34 μ.μ. UTC+3, ο χρήστης Chris Angelico έγραψε:
> On Sat, Sep 15, 2012 at 10:22 PM, Νικόλαος Κούρας <nikos.gr33k at gmail.com> wrote:
> 
> > Hello,
> 
> >
> 
> > I recently changed webhost and in the new one iam getting this error you can see if you visit http://superhost.gr when program execution reaches the line:
> 
> >
> 
> >    f = open( '../' + page )
> 
> >
> 
> > In the previous host i wasn't getting this error.
> 
> >
> 
> > page's contents is:
> 
> >
> 
> > page = form.getvalue('page')
> 
> 
> 
> Well, clearly '../' is a string (str), and page must be a list. But
> 
> without knowing your web framework it's hard to be sure what's going
> 
> on.
> 
> 
> 
> My guess is that form.getvalue() is returning a list of form elements
> 
> with that name, so you have a list with one element in it. But check
> 
> your documentation to be sure.
> 
> 
> 
> Since this changed when you changed hosts, it may mean you now have a
> 
> completely different framework. Possibly you can configure this.
> 
> Alternatively, it may simply be a different version of the same
> 
> system. It's hard to know just based on this, though.
> 
> 
> 
> ChrisA

Iam not using frameworks just plain python code written in Notepad++

Can you please tell me how to switch this line in order for this line to work?