Metaprogramming question

[Steve Menard]

I have a need to create class instance without invokking the class' __init__
method.

Were I using old-style classes, I'd use new.instance() function. However, I
am using new-style classes and new.instance() complain "TypeError:
instance() argument 1 must be classobj, not type" ...

So my question is, how to replicate new.instance() functionality with new
classes?

Steve Menard
Author and Maintainer of http://jpype.sourceforge.net

[MonkeeSage]

Re: Metaprogramming question

Steve Menard wrote:

So my question is, how to replicate new.instance() functionality with new
classes?

class A(object):
def __init__(self):
print "Class A"
A()
A.__new__(A) # <- this one

Regards,
Jordan

[Georg Brandl]

Re: Metaprogramming question

Steve Menard wrote:

I have a need to create class instance without invokking the class' __init__
method.
>
Were I using old-style classes, I'd use new.instance() function. However, I
am using new-style classes and new.instance() complain "TypeError:
instance() argument 1 must be classobj, not type" ...
>
So my question is, how to replicate new.instance() functionality with new
classes?

Use object.__new__.

Georg