[Python-Dev] feature request: inspect.isgenerator

[Georg Brandl]

Michele Simionato wrote:
> Georg Brandl <g.brandl <at> gmx.net> writes:
>> 
>> > Also, should one add
>> > a GeneratorType, perhaps as a subclass of FunctionType?
>> 
>> Add GeneratorType where? There is already one in the types module.
> 
> Yep, this is the crux. types.GeneratorType refers to generator objects,
> which in an improper sense are "instances" of a "generator function".
> I.e.
> 
> def g(): yield 1 # this is a generator
> 
> go = g() # this is a generator object
> 
> I want isgenerator(g) == True, but isgenerator(go) == False.

Ah, ok. But then I would name the function differently, perhaps
isgeneratorfunc().

> So, what should be the class of g ? Maybe we can keep FunctionType
> and don't bother.

I would say, keep FunctionType. There's no real need to know the exact
type except for inspecting, and for that, the new function in inspect
can be used.

Georg