impl/python/calculate_rational.py

Imports name this capability’s declared dependencies, which fune builds next to it in your project; each one links to its page.

from .math_rational_add_rational import add_rational  ← addRational, another function of this group · built into the same file, even by a slim install
from .math_rational_divide_rational import divide_rational  ← divideRational, another function of this group · built into the same file, even by a slim install
from .math_rational_multiply_rational import multiply_rational  ← multiplyRational, another function of this group · built into the same file, even by a slim install
from .math_rational_subtract_rational import subtract_rational  ← subtractRational, another function of this group · built into the same file, even by a slim install
from .math_rational_types import Rational, RationalOp


def calculate_rational(a: Rational, op: RationalOp, b: Rational) -> Rational:
    """Add, subtract, multiply or divide two fractions exactly.

    The result is always reduced with a positive denominator, so equal values
    have equal fields.
    """
    if op == "add":
        return add_rational(a, b)
    if op == "subtract":
        return subtract_rational(a, b)
    if op == "multiply":
        return multiply_rational(a, b)
    if op == "divide":
        return divide_rational(a, b)
    raise ValueError('unknown operation "%s"' % (op,))