Making code faster

[Armin Steinhoff]

JB <jblazi at hotmail.com> wrote in message news:<3d3445f9_7 at news.newsgroups.com>...
> How can I make the following code faster? I open a (text) 
> file and read the lines in the file. The lines of the file 
> have the form
> 
> [<string>,<string>]
> 
> After the lines have been loaded, I set up a new list via 
> the function tmp1.
> 
>     i = -1
>     print 'loading file'
>     def tmp1(s):
>       global i
>       i += 1
>       return QSimpleViewItem(i,self.sv.lv.newColor,eval(s))
> 
>     try:
>       myfile = open(filename)
>     except:
>       pass
>     else:
>       tmp = myfile.readlines()
>       print 'lines loaded'
>       datei.close()
>       self.sv.lv.rows = map(tmp1,tmp)
>       self.sv.lv.visible = range(len(self.sv.lv.rows))
>       print 'lines decoded',self.sv.lv.rows[0].col[0]
> 
> Any ideas? It is astonishing that loading the lines

 ... how man lines? How long are the lines?

> from 
 external storage takes much less time than the mapping 
> itself!

Have you considered to use Pyrex in order to convert it into a C module??

Armin