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Mon Jan 16 10:53:06 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-January/059765.html

On Monday 16 January 2006 20:05, Nick Coghlan wrote:
> For example, what's wrong with "hasattr(x, __int__)"? That works
> for all the builtin types, and, IMO, anyone defining a direct
> conversion to an integer for a non-numeric type deserves whatever
> happens to them.

What about something that's got something like:

  def __int__(self):
      raise TypeError("This type is not a number!")

I don't see a problem with defining basenumber. For the use cases, 
pretty much the same set as basesstring.

-- 
Anthony Baxter     <anthony at interlink.com.au>
It's never too late to have a happy childhood.

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[Python-Dev] basenumber redux