[Python-Dev] return type of __complex__

[Nick Coghlan]

On Fri, Oct 19, 2012 at 11:08 PM, Antonio Cuni <anto.cuni at gmail.com> wrote:
> Is that the real intended behavior?

Given the way complex numbers interact with floats generally,
returning a complex number with no imaginary component as a floating
point value seems legitimate and the checks in cmath overly strict.
Otherwise you would get redundancy like:

    def __complex__(self):
        return complex(value)

or

    def __complex__(self):
        return value + 0j

More importantly, relaxing the checks in cmath is backwards
compatible. while tightening up the checks in complex_new is not.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia