deprecating parameters

[Robert Collins]

On Sun, 2006-01-15 at 19:39 -0600, John Arbash Meinel wrote:

> What do you consider to be a 'nice' parameter deprecation decorator.

One that handles the use of the parameter as:
 * kwarg
 * positional arg
 * both at once (cant happen when its explicit but in a wrapper weird
shit can occur).

Also it should gives a clear message, and probably a forwarding address
like I've done manually. Also because we need to handle the old
parameter we'll still need to write the code to forward. So once I have
3 or 4 examples I'll factor it out and *maybe* make a decorator for it.

Rob

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