gistfile1.txt

>>>> x = object
>>>> inspect.isbuiltin(x)
False
>>>> inspect.isclass(x)
True
>>>> inspect.isbuiltin(x.__init__)
False
>>>> inspect.ismethod(x.__init__)
True
>>>> inspect.getargspec(x.__init__)
ArgSpec(args=['obj'], varargs='args', keywords='keywords', defaults=None)

# claims to take varargs and keywords huh?

>>>> x('4', foo='bar')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: default __new__ takes no parameters

# its not a straight up function that accepts the args 
# it claims.  What is the universal always-works way to 
# detect functions or constructors that aren't straight 
# up user-defined functions?  in cPython, isbuiltin() works great.
>>>>