> I am not advocating this, but this could be:
> def abs(self):
> with self:
> with math:
> return sqrt(x**2 + y**2 + z**2)
> The idea being that "with self" use
> creates a new namespace:
> newGlobal= oldGlobal + oldLocal
> newLocal= names from self
You don't know what those names are until runtime. Suppose, for example,
that self happens to have acquired an attribute named "math"? Then
with self:
with math:
return sqrt(x**2 + y**2 + z**2)
doesn't do what you expected, because "with math" turns out to have meant
"with self.math"
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