Hi
My question is about how special methods are stored internally in
Python objects.
Consider a new-style class which implements special methods such as
__call__ and __new__
class C(type):
def __call__(...):
<body>
class B:
__metaclass__ = C
<stuff>
b= B()
The type of C is 'type', that of B is 'C'. When B is instantiated,
the __call__ method of C is first invoked, since C is the metaclass
for B.
Internally, when a Python callable object 'obj' is called, the actual
function called seems to be
'obj->ob_type->tp_call'.
Does this that somehow the '__call__' method defined in C above is
assigned to the 'tp_call' slot in the object representing the class
C, instead of it just being stored in the dictionary like a normal
attribute? Where and how does this magic happen exactly? I'd
appreciate any level of detail.
Thanks!
Raj
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