It looks like you have an empty value in the table row where you experience
the error.
On Thursday, February 13, 2014 6:49:44 AM UTC-5, Robin Manoli wrote:
>
> Hey,
> I have a decimal in db, for which I tried numerous ways to round to two
> decimal points, and also to calculate with other numbers. Basically I want
> to convert it to a float, but could find no way to do so.
>
> The Field looks like this:
> Field('score', 'decimal(4,3)')
>
> It does work to convert to string such as:
> {{=str(t.score)}}
> but neither does this work:
> {{=float(str(t.score))}} # error: <type 'exceptions.ValueError'> could
> not convert string to float: None"
> and nor this:
> {{=float(t.score)}} # error: <type 'exceptions.TypeError'> float()
> argument must be a string or a number
>
> I even tried to import decimal and calculate that with t.score, but even
> that didn't work! What's going on?
>
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