[Baypiggies] Preserving integers when loading a file into a list

[Adam Hupp]

You'll need a function that attempts integer conversion and returns
the original value if it fails:

def try_int_convert(sval):
    try:
        return int(sval)
    except ValueError:
        return sval

And then you can run the second column through that function:

result = []
for i in file(data_file,'rU'):
    splat = i.rstrip().split()
    result.append((splat[0], try_int_convert(splat[1])))

On Sun, Jun 15, 2008 at 11:09 AM, Al Nevarez <anevare2 at yahoo.com> wrote:
> Hello,
> What's the best way to preserve integers when loading a file into a list?
>
> for example.. assume we have a tab delimited file that looks like this:
> A       1
> B       2
> C       three
>
> I have a line in my program to read that file in like this:
>
> my_data=[line.strip().split('   ') for line in file(data_file,'rU')]
>
> the result in my_data is:
> [['A', '1'], ['B','2'], ['C','three']]
>
> But I need my_data to be like this:
> [['A', 1], ['B',2], ['C','three']]
>
> Needs to be automatic.. i.e. I'm not sure ahead of time, which if any value anywhere will be a string or an integer.
>
> Thanks!
> Al
>
>
>
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-- 
Adam Hupp | http://hupp.org/adam/