[Python-Dev] Mixing float and Decimal -- thread reboot

[Raymond Hettinger]

One other thought.

The Decimal constructor should now accept floats as a possible input type.
Formerly, we separated that out to Decimal.from_float() because
decimals weren't interoperable with floats.

This will put decimal and float back on equal footing so that we have both:
    float(some_decimal)        # coerce to binary float
and
    Decimal(some_float)       # coerce to decimal float

That will also save us from odd idioms like:

    d = some_float + Decimal(0)   # coerce to decimal then apply context rounding

This also matches the behavior of other constructors:
    int(some_float)
or
    int(some_decimal)
or
    str(some_float)
or
    str(some_decimal)


Raymond