[Python-ideas] isinstance(Decimal(), Real) -> False?

[Vernon D. Cole]

Darn right it should return False.  Given the principle of least surprise
(and my prejudices built up over 40 years as a computer programmer) I would
expect that decimal.Decimal data would be stored internally as some form of
decimal data, and would store into a database as such.  It would be
expected to be in a fixed point format.  Real, on the other hand, I would
expect to be stored as an IEEE double precision floating point number, or
something like that.
  I don't care whether a fixed point decimal number might be defined by a
mathematician as "real" -- I care whether it can be processed by an FPU,
and whether it will loose precision in large financial calculations.
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