mi sono reso conto che Decimal("1e30") crea un decimal a partire da un
float, e non dal numero esatto come pensavo, comunque non ci sono
differenze anche facendo:
>>> mean([Decimal("1"+"0"*30), 1, 3, Decimal("-1"+"0"*30)])
Decimal('0')
questa era la discussione alla quale mi riferisco:
https://mail.python.org/pipermail/python-dev/2005-June/054300.html
> The rational proposal also has an intrinsic weakness shared with Java's
> prior versions of BigDecimal which they found to be unworkable in practice.
> The weakness was that repeated operations caused the internal number of
> digits to grow beyond reason.
ci sono dei benchmark?
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