In article <453A507E.4070602 at websafe.com>,
Larry Bates <larry.bates at websafe.com> wrote:
> Because datetime is a new-style class:
Ah.
> The Constructor __new__
>> If you are like me, then you probably always thought of the __init__ method
> as
> the Python equivalent of what is called a constructor in C++. This isn't the
> whole story.
>> When an instance of a class is created, Python first calls the __new__ method
> of
> the class. __new__ is a static method that is called with the class as its
> first
> argument. __new__ returns a new instance of the class.
>> The __init__ method is called afterwards to initialize the instance. In some
> situations (think "unplickling"!), no initialization is performed. Also,
> immutable types like int and str are completely constructed by the __new__
> method; their __init__ method does nothing. This way, it is impossible to
> circumvent immutability by explicitly calling the __init__ method after
> construction.
>>> I think what you wanted was:
>> >>> class ts(datetime):
> ... def __new__(self): pass
> ...
> >>> a=ts()
>> -Larry
Thanks!
rg
