ConfigParser & converting strings to lists
cliechti at gmx.net
Sun Jun 23 14:50:09 CEST 2002
"Edward K. Ream" <edream at tds.net> wrote in news:3D159F06.2154D3F3 at tds.net:
> To complete this topic, let me restate the problem and JohnJacob's
> elegant solution.
> Suppose files is a list of strings, and we have written a configuration
> section like this:
> config = ConfigParser.ConfigParser()
> config.set("recent files", "recentFiles, files)
> Then the elegant way of retrieving files _as a list_ is:
> files = eval(config.get("recent files", "recentFiles"))
it isn't that elegant i tend to call that sloppy ;-) the problem is that
you execute arbitrary python expressions and you hope to get a list. but
that is not sure, the user could have edited the config file.
exec and eval are always a risk in your code. e.g they could rise any
exception because you don't know what they realy execute.
the split version is much more secure. you could also try a pickle. witch
pickle.dumps you can get a string and reterive the old object using loads()
but that isn't as secure as split.
if thats all too complicated, use your version with individual names
"file1", "file2", ... it's much saver for a progrom that you release in the
PS you mentioned you see double backslashes. maybe you looked at the repr
of a string:
>>> s = "he\tllo"
>>> print s
as you can see there is not realy a double backslash...
Chris <cliechti at gmx.net>
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