Is 'isinstance()' the right thing?

[Ralf Juengling]

Erik Max Francis <max at alcyone.com> writes:

> Ralf Juengling wrote:
> 
> > So, what is the proper, 'pythonic' way of argument checking?
> 
> The "Pythonic" way of argument checking is to simply use it and catch
> the exceptions that will be thrown if it doesn't behave as planned.

Hm, you might risk to destroy something this way (i.e. when an exception
occurs to late). 

> 
> Depending on what you want, some of the is... functions in the operator
> module might be to your liking.

Thanks, I wasn't aware of these (looked for them in the type module).
*BUT*, these (eg. isSequenceType) work only for C extension types, right?

Ralf