How to recognize a generator function?

[Oscar Rambla]

-Andrew. answered.
>
>How do you know what *any* function returns before you call it?

I'll try to explain me better. Supose :

# a generator-function
def f():
  a = 1
  yield a

# a kind of callback
def call( object )
  if isGeneratorfunction( object):
      g = object()
  elif Type(object) is GeneratorType:
      object.next()

call( f )

The question is the following:

def isGeneratorfunction():

   return True


My Original message was:
Hi,

I'm not been able to find a solution to the following:

How to recognize if a function is a generator function before calling it?
(Alternatives to having to inspect code for a yield or wrapping it into a
class).

Note: I refer to the function, not to the generator itself.

Thank you in advance.

-Oscar

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