multiply multiplies two operands. If either operand is a special value then the general rules apply. Otherwise, the operands are multiplied together ('long multiplication'), resulting in a number which may be as long as the sum of the lengths of the two operands.
(self, a, b)
| 4919 | return a.__neg__(context=self) |
| 4920 | |
| 4921 | def multiply(self, a, b): |
| 4922 | """multiply multiplies two operands. |
| 4923 | |
| 4924 | If either operand is a special value then the general rules apply. |
| 4925 | Otherwise, the operands are multiplied together |
| 4926 | ('long multiplication'), resulting in a number which may be as long as |
| 4927 | the sum of the lengths of the two operands. |
| 4928 | |
| 4929 | >>> ExtendedContext.multiply(Decimal('1.20'), Decimal('3')) |
| 4930 | Decimal('3.60') |
| 4931 | >>> ExtendedContext.multiply(Decimal('7'), Decimal('3')) |
| 4932 | Decimal('21') |
| 4933 | >>> ExtendedContext.multiply(Decimal('0.9'), Decimal('0.8')) |
| 4934 | Decimal('0.72') |
| 4935 | >>> ExtendedContext.multiply(Decimal('0.9'), Decimal('-0')) |
| 4936 | Decimal('-0.0') |
| 4937 | >>> ExtendedContext.multiply(Decimal('654321'), Decimal('654321')) |
| 4938 | Decimal('4.28135971E+11') |
| 4939 | >>> ExtendedContext.multiply(7, 7) |
| 4940 | Decimal('49') |
| 4941 | >>> ExtendedContext.multiply(Decimal(7), 7) |
| 4942 | Decimal('49') |
| 4943 | >>> ExtendedContext.multiply(7, Decimal(7)) |
| 4944 | Decimal('49') |
| 4945 | """ |
| 4946 | a = _convert_other(a, raiseit=True) |
| 4947 | r = a.__mul__(b, context=self) |
| 4948 | if r is NotImplemented: |
| 4949 | raise TypeError("Unable to convert %s to Decimal" % b) |
| 4950 | else: |
| 4951 | return r |
| 4952 | |
| 4953 | def next_minus(self, a): |
| 4954 | """Returns the largest representable number smaller than a. |