[Tutor] attribute error

[Alan Gauld]

"Sara Johnson" <sarliz73 at yahoo.com> wrote

> However, is there an indentation error here?

Not that I can see. Is there an error? If so can you send the 
traceback?
Its very hard to answer questions without any context.

> I may just be too frustrated to see it.
>
> for key in skeys:
>         fracmiss=1.*numberMissing(z[key].values())/nsites #note 
> decimal multiplication, 1.*

This is a mess. Why have that long comment when all that's needed
is to add the zero?! (and some spaces to make it legible...)

        fracmiss = 1.0 * numberMissing( z[key].values() ) / nsites
        outstring = "%s has %4.1f%% missing" % (key, 100 * fracmiss)
        if fracmiss > 0.0:
                print outstring

It looks OK apart from the poor style but I don't see anything that is
an error. What are you seeing?

On the style front, if you want to force a result to a float it's more
conventional to use the float() conversion function:

        fracmiss = float( numberMissing( z[key].values() ) / nsites )

And comparing to 0.0 doesn't really add anything except two 
characters,
it could just as well be plain old 0.

        if fracmiss > 0:

HTH,

Alan G.