[Tutor] calculate the sum of a variable - python

[Marc Tompkins]

On Sun, Mar 6, 2011 at 8:46 PM, nookasree ponamala <nookasree at yahoo.com>wrote:

> Thanks for the reply Wayne, but still it is not working,
>
> when I used int It throws the below error:
>   File "<stdin>", line 2, in <module>
>   File "<stdin>", line 3, in summary
>   File "<stdin>", line 3, in <genexpr>
> ValueError: invalid literal for int() with base 10: "'"
>
> I tried using float and the error is:
> Traceback (most recent call last):
>   File "<stdin>", line 2, in <module>
>   File "<stdin>", line 3, in summary
>   File "<stdin>", line 3, in <genexpr>
> ValueError: invalid literal for float(): '
>
> Thanks,
> Sree.
>
>
I played with it a bit and simplified things a (little) bit:

>        b = (aline[3].strip('$'))
>        t = (a, float(b))
>        tot.append(t)
>        print tot
>

You were converting the tuple to a string before adding it to the list; you
don't need to do that, and it was concealing the real cause of your problem,
which is that you either need to skip/get rid of the top line of your file,
or write some error-handling code to deal with it.  Currently, you're trying
to convert the string 'amt' into a number, and you just can't do that.
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