diff options
Diffstat (limited to 'Lib/_pydecimal.py')
| -rw-r--r-- | Lib/_pydecimal.py | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Lib/_pydecimal.py b/Lib/_pydecimal.py index ab989e5206..8c0ef57092 100644 --- a/Lib/_pydecimal.py +++ b/Lib/_pydecimal.py @@ -3164,6 +3164,12 @@ class Decimal(object): """Return True if self is a zero; otherwise return False.""" return not self._is_special and self._int == '0' + def is_integer(self): + """Return True is self is finite and integral; otherwise False.""" + if self._is_special: + return False + return self.to_integral_value(rounding=ROUND_FLOOR) == self + def _ln_exp_bound(self): """Compute a lower bound for the adjusted exponent of self.ln(). In other words, compute r such that self.ln() >= 10**r. Assumes @@ -4659,6 +4665,25 @@ class Context(object): a = _convert_other(a, raiseit=True) return a.is_zero() + def is_integer(self, a): + """Return True if the operand is integral; otherwise return False. + + >>> ExtendedContext.is_integer(Decimal('0')) + True + >>> ExtendedContext.is_integer(Decimal('2.50')) + False + >>> ExtendedContext.is_integer(Decimal('-0E+2')) + True + >>> ExtendedContext.is_integer(Decimal('-0.5')) + False + >>> ExtendedContext.is_integer(Decimal('NaN')) + False + >>> ExtendedContext.is_integer(10) + True + """ + a = _convert_other(a, raiseit=True) + return a.is_integer() + def ln(self, a): """Returns the natural (base e) logarithm of the operand. |