Length of an Unsized Object

[MRAB]

Victor Subervi wrote:
> Hi;
> I have this code:
> 
>         sql = 'describe %s %s;' % (optionsStore, option)
>         print sql
>         cursor.execute(sql)
>         descr = cursor.fetchone()
>         if len(descr) is not None:
> 
> Python complains:
> 
> *TypeError*: len() of unsized object
> 
> Please advise how to rewrite the last line so as to avoid the infamous 
> try/except.

What is the value of descr when it raises that exception? Try printing
descr (or repr(descr)) to find out.

BTW, len() always returns an int, so "len(descr) is not None" is always
true.