Returns the exponent of the magnitude of the operand's MSD. The result is the integer which is the exponent of the magnitude of the most significant digit of the operand (as though the operand were truncated to a single digit while maintaining the value of that digi
(self, a)
| 4688 | return a.log10(context=self) |
| 4689 | |
| 4690 | def logb(self, a): |
| 4691 | """ Returns the exponent of the magnitude of the operand's MSD. |
| 4692 | |
| 4693 | The result is the integer which is the exponent of the magnitude |
| 4694 | of the most significant digit of the operand (as though the |
| 4695 | operand were truncated to a single digit while maintaining the |
| 4696 | value of that digit and without limiting the resulting exponent). |
| 4697 | |
| 4698 | >>> ExtendedContext.logb(Decimal('250')) |
| 4699 | Decimal('2') |
| 4700 | >>> ExtendedContext.logb(Decimal('2.50')) |
| 4701 | Decimal('0') |
| 4702 | >>> ExtendedContext.logb(Decimal('0.03')) |
| 4703 | Decimal('-2') |
| 4704 | >>> ExtendedContext.logb(Decimal('0')) |
| 4705 | Decimal('-Infinity') |
| 4706 | >>> ExtendedContext.logb(1) |
| 4707 | Decimal('0') |
| 4708 | >>> ExtendedContext.logb(10) |
| 4709 | Decimal('1') |
| 4710 | >>> ExtendedContext.logb(100) |
| 4711 | Decimal('2') |
| 4712 | """ |
| 4713 | a = _convert_other(a, raiseit=True) |
| 4714 | return a.logb(context=self) |
| 4715 | |
| 4716 | def logical_and(self, a, b): |
| 4717 | """Applies the logical operation 'and' between each operand's digits. |