diff options
Diffstat (limited to 'Lib/decimal.py')
| -rw-r--r-- | Lib/decimal.py | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/Lib/decimal.py b/Lib/decimal.py index ecf0cd5..958b2f9 100644 --- a/Lib/decimal.py +++ b/Lib/decimal.py @@ -2044,12 +2044,14 @@ class Decimal(object): # case where xc == 1: result is 10**(xe*y), with xe*y # required to be an integer if xc == 1: - if ye >= 0: - exponent = xe*yc*10**ye - else: - exponent, remainder = divmod(xe*yc, 10**-ye) - if remainder: - return None + xe *= yc + # result is now 10**(xe * 10**ye); xe * 10**ye must be integral + while xe % 10 == 0: + xe //= 10 + ye += 1 + if ye < 0: + return None + exponent = xe * 10**ye if y.sign == 1: exponent = -exponent # if other is a nonnegative integer, use ideal exponent @@ -2322,9 +2324,10 @@ class Decimal(object): # try for an exact result with precision +1 if ans is None: ans = self._power_exact(other, context.prec + 1) - if ans is not None and result_sign == 1: - ans = _dec_from_triple(1, ans._int, ans._exp) - exact = True + if ans is not None: + if result_sign == 1: + ans = _dec_from_triple(1, ans._int, ans._exp) + exact = True # usual case: inexact result, x**y computed directly as exp(y*log(x)) if ans is None: |