diff options
Diffstat (limited to 'Lib/decimal.py')
| -rw-r--r-- | Lib/decimal.py | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Lib/decimal.py b/Lib/decimal.py index 8543e1090a..b2bfc567a4 100644 --- a/Lib/decimal.py +++ b/Lib/decimal.py @@ -2160,12 +2160,13 @@ class Decimal(object): end -= 1 return Decimal( (dup._sign, dup._int[:end], exp) ) - - def quantize(self, exp, rounding=None, context=None): + def quantize(self, exp, rounding=None, context=None, watchexp=True): """Quantize self so its exponent is the same as that of exp. Similar to self._rescale(exp._exp) but with error checking. """ + exp = _convert_other(exp, raiseit=True) + if context is None: context = getcontext() if rounding is None: @@ -2182,6 +2183,16 @@ class Decimal(object): return context._raise_error(InvalidOperation, 'quantize with one INF') + # if we're not watching exponents, do a simple rescale + if not watchexp: + ans = self._rescale(exp._exp, rounding) + # raise Inexact and Rounded where appropriate + if ans._exp > self._exp: + context._raise_error(Rounded) + if ans != self: + context._raise_error(Inexact) + return ans + # exp._exp should be between Etiny and Emax if not (context.Etiny() <= exp._exp <= context.Emax): return context._raise_error(InvalidOperation, |