"Bjoern Schliessmann" <[EMAIL PROTECTED]> wrote
in message news:[EMAIL PROTECTED]
|> - only functions being attributes of a class...
|What, IYHO, is the difference between a method and a function?
A method is a function accessed as an attribute of a class or instance.
As an object type, it is a *runtime* function wrapper.
|> (ok, I know, you meant "functions declared within a class> statement").
| I think that those functions _are_ special ones
Thinking does not make things so.
|since the compiler is able to make "method(instance, a, b)" out of
|"instance.method(a, b)".
No it does not. The method wrapping is done at runtine. The compiler is
ignorant of the wrapping that will be done.
>>> class C:
def meth(self): pass
>>> c = C()
>>> import dis
>>> def f(): return c.meth()
>>> dis.dis(f)
1 0 LOAD_GLOBAL 0 (c)
3 LOAD_ATTR 1 (meth)
6 CALL_FUNCTION 0
9 RETURN_VALUE
The function gets wrapped as a bound method as part of LOAD_ATTR. When the
compiler sees <expr>(args), it does not know and does not care about the
particular type that <expr> will become. It just assumes that it will be
callable and emits the code to call it. Consider
>>> def g(): return C()
>>> dis.dis(g)
1 0 LOAD_GLOBAL 0 (C)
3 CALL_FUNCTION 0
6 RETURN_VALUE
It does not notice and does not care that 'C' will be bound to a class.
Terry Jan Reedy
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