On Thursday, September 7, 2017 at 4:27:48 PM UTC+5:30, Andrej Viktorovich wrote:
> Hello
>
> For my understanding both - __init__() and __new__() works like constructors.
> And __new__() looks is closer to constructor. __init__() is more for variable
> initialization. Why I can't just initialize in __init__() ?
>
> class ExampleClass(object):
> def __new__(cls,value):
> print("creating new instance with val %s" % (value,) )
> instance = super(ExampleClass,cls).__new__(cls)
> return instance
> def __init__(self, value):
> print("Initialising instance... with val %s" % (value,))
> self.payload = value
>
> exampleInstance = ExampleClass(42)
> print(exampleInstance.payload)
If you are not sure, forget about __new__
__init__ is the one you need mostly
[Ive never used new (in Python); C++ is a different case altogether]
See
https://mail.python.org/pipermail/tutor/2008-April/061424.html
and further thread
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