On 2019-08-06 17:30, TB wrote:
sage: plot(lambda x: x.imag + 2) # Works sage: plot(lambda x: x.imag() + 2, (x, -3, 3)) # Empty plot
That's "only" an annoyance: you need to use x.imag or x.imag() depending on what x is. That's not a problem of interoperability. And if you really want generic code, you can always write complex(x).imag (at some performance cost). So it's less a problem than Fraction.
To add another data point about triggering unexpected computations, numpy.array does have .real and .imag properties.
As far as I can see, it doesn't actually use .real or .imag on the objects that it wraps, so again there is no problem here.
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