How to create a class instance without calling initializer?

Question

Is there any way to avoid calling __init__ on a class while initializing it, such as from a class method?

I am trying to create a case and punctuation i

Answer 1

A trick the standard pickle and copy modules use is to create an empty class, instantiate the object using that, and then assign that instance's __class__ to the "real" class. e.g.

>>> class MyClass(object):
...     init = False
...     def __init__(self):
...         print 'init called!'
...         self.init = True
...     def hello(self):
...         print 'hello world!'
... 
>>> class Empty(object):
...     pass
... 
>>> a = MyClass()
init called!
>>> a.hello()
hello world!
>>> print a.init
True
>>> b = Empty()
>>> b.__class__ = MyClass
>>> b.hello()
hello world!
>>> print b.init
False

But note, this approach is very rarely necessary. Bypassing the __init__ can have some unexpected side effects, especially if you're not familiar with the original class, so make sure you know what you're doing.