Re: Python 2.6 Deprecation Warnings with __new__ — Can someone explain why?

Terry Reedy tjreedy at udel.edu
Fri Oct 23 09:04:41 CEST 2009


Consider this:

def blackhole(*args, **kwds): pass

The fact that it accept args that it ignores could be considered 
misleading or even a bug.  Now modify it to do something useful, like 
return a new, naked, immutable object that is the same for every call 
except for identity, and which still totally ignores the args as 
irrelavant. Call it object.__new__. It is just as misleading, if not 
more so.

In 3.x, the mistake has been fixed.
 >>> object(1)
Traceback (most recent call last):
   File "<pyshell#9>", line 1, in <module>
     object(1)
TypeError: object.__new__() takes no parameters

Terry Jan Reedy




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