Feat(Compute): Add MOpolynomial with scalar

mapytex/calculus/core/compute/add.py

@@ -16,6 +16,7 @@ from ..tree import Tree
 from ..MO.mo import MO, MOnumber, MOstr
 from ..MO.fraction import MOFraction
 from ..MO.monomial import MOstrPower, MOMonomial
+from ..MO.polynomial import MOpolynomial
 from .exceptions import AddError
 from .arithmetic import lcm
 from .filters import special_case
@@ -236,6 +237,72 @@ def mostrpower_mostrpower(left, right):
         raise NotImplementedError("Can't add 2 MOstrPower with not same power")
     return MOMonomial(2, left.variable, left.power)
 
+@add.register((MOnumber, MOFraction), MOpolynomial)
+@special_case(add_filter)
+def monumber_mofraction(left, right):
+    """ Add a scalar to a polynomial
+
+    :example:
+    >>> a = MOnumber(1)
+    >>> b = MOpolynomial("x", [2, 3, 4])
+    >>> print(add(a, b))
+    +
+     > +
+     | > *
+     | | > 4
+     | | > ^
+     | | | > x
+     | | | > 2
+     | > *
+     | | > 3
+     | | > x
+     > +
+     | > 1
+     | > 2
+    """
+    if 0 not in right.coefficients.keys():
+        raise NotImplementedError("Polynomial with no constant, no calculus to do")
+
+    right_const = right.coefficients[0]
+    right_other = {k:v for k,v in right.coefficients.items() if k != 0}
+    right_remain = MOpolynomial(right.variable, right_other)
+
+    add_consts = Tree("+", left, right_const)
+    return Tree('+', right_remain, add_consts)
+
+@add.register(MOpolynomial, (MOnumber, MOFraction))
+@special_case(add_filter)
+def monumber_mofraction(left, right):
+    """ Add a scalar to a polynomial
+
+    :example:
+    >>> a = MOpolynomial("x", [2, 3, 4])
+    >>> b = MOnumber(1)
+    >>> print(add(a, b))
+    +
+     > +
+     | > *
+     | | > 4
+     | | > ^
+     | | | > x
+     | | | > 2
+     | > *
+     | | > 3
+     | | > x
+     > +
+     | > 1
+     | > 2
+    """
+    if 0 not in left.coefficients.keys():
+        raise NotImplementedError("Polynomial with no constant, no calculus to do")
+
+    left_const = left.coefficients[0]
+    left_other = {k:v for k,v in left.coefficients.items() if k != 0}
+    left_remain = MOpolynomial(left.variable, left_other)
+
+    add_consts = Tree("+", right, left_const)
+    return Tree('+', left_remain, add_consts)
+
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