> Yes, special methods populate the slots in the structures which Python > uses to represent types. Objects/typeobject.c in the Python source > distribution does the hard work, particularly in function type_new
Thanks for that quick response. I am quite comfortable with C code and am trying to understand exactly what happens when a new-style class is created, and then instantiated. I have been reading typeobject.c and type_new() inside it in detail, and there are a few issues I am trying to figure out. I can see a lot of *SLOT() macros in the file that seem to set the slots to appropriate values. What I am having trouble figuring out is the connection i.e. at what point during construction of the class object in type_new() are those slots allotted? Is it the tp_alloc() function which does this? Is there some kind of descriptor or other mechanism connecting special method names with their slots in the object representation? (e.g. "__call__" with type->tp_call) Also, what happens when a class inherits from multiple classes with their own __call__ methods? Where and how is it decided which __call__ goes into the tp_call slot? I'm sure I'll eventually figure it out if I stare at the code hard enough, but would totally appreciate any help I can get :) Thanks again! Raj -- http://mail.python.org/mailman/listinfo/python-list
