howto check is function capable of obtaining **kwargs?

[dmitrey]

hi all,
howto check is function capable of obtaining **kwargs?

i.e. I have some funcs like
def myfunc(a,b,c,...):...

some like
def myfunc(a,b,c,...,*args):...

some like
def myfunc(a,b,c,...,*args, **kwargs):...

some like
def myfunc(a,b,c,...,zz=zz0):...

So I need to know is the given function capable of handling zz
parameter, for example the call
myfunc(a,b,c,...,zz=4,...)

Thank you in advance, D.