[Python-checkins] r55138 - python/branches/decimal-branch/Lib/decimal.py

[Neal Norwitz]

On 5/4/07, facundo.batista <python-checkins at python.org> wrote:
> Author: facundo.batista
> Date: Fri May  4 23:00:49 2007
> New Revision: 55138
>
> Modified:
>    python/branches/decimal-branch/Lib/decimal.py
> Log:
>
> Added a private function _islogical(), which determines if the
> operand is a logical one or not. Also coded the logical_invert()
> operation, which passes all tests ok.
>
>
> Modified: python/branches/decimal-branch/Lib/decimal.py
> ==============================================================================
> --- python/branches/decimal-branch/Lib/decimal.py       (original)
> +++ python/branches/decimal-branch/Lib/decimal.py       Fri May  4 23:00:49 2007
> @@ -2429,11 +2429,53 @@
>          without limiting the resulting exponent).
>          """
>
> +    def _islogical(self):
> +        """Return 1 is self is a logical operand.
> +
> +        For being logical, it must be a finite numbers with a sign of 0,
> +        an exponent of 0, and a coefficient whose digits must all be
> +        either 0 or 1.
> +        """
> +        if self._sign != 0 or self._exp != 0:
> +            return 0
> +        for dig in self._int:
> +            if dig not in (0, 1):
> +                return 0
> +        return 1

Why not use a boolean instead of 0/1?

n