Feat: Init polynomial with coefficients

mapytex/__init__.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 # encoding: utf-8
 
-from .calculus import Expression, Integer, Decimal, random_list, render
+from .calculus import Expression, Integer, Decimal, random_list, render, Polynomial
 
 # Expression.set_render('tex')
 

mapytex/calculus/API/__init__.py

@@ -125,6 +125,7 @@ x^7
 
 from .expression import Expression
 from .tokens import Token
+from .tokens.polynomial import Polynomial
 from .tokens.number import Integer, Decimal, Fraction
 from .renders import render
 

mapytex/calculus/API/tokens/polynomial.py

@@ -15,6 +15,7 @@ from .token import Token
 from . import to_be_token
 from ...core.MO import MO
 from ...core.MO.atoms import moify
+from ...core.MO.polynomial import MOpolynomial
 
 __all__ = ["Polynomial", "Quadratic", "Linear"]
 
@@ -44,9 +45,21 @@ class Polynomial(Token):
         return cls(mo, name, ancestor)
 
     @classmethod
-    def from_coefficients(cls, coefficients):
-        """ Initiate polynomial from list of coefficients """
-        pass
+    def from_coefficients(cls, coefficients, variable_name="x", name=""):
+        """ Initiate polynomial from list of coefficients 
+
+        :examples:
+        >>> P = Polynomial.from_coefficients([1, 2, 3])
+        >>> P
+        <Polynomial 3x^2 + 2x + 1>
+        >>> P = Polynomial.from_coefficients([1, 2, -3])
+        >>> P
+        <Polynomial - 3x^2 + 2x + 1>
+        >>> P = Polynomial.from_coefficients([1, 2, 3], "y")
+        >>> P
+        <Polynomial 3y^2 + 2y + 1>
+        """
+        return cls(MOpolynomial(variable_name, coefficients), name)
 
     @classmethod
     def random(cls):

mapytex/calculus/__init__.py

@@ -30,7 +30,7 @@ Expression is the classe wich handle all calculus. It can randomly generate or i
 
 """
 
-from .API import Expression, Integer, Decimal, render
+from .API import Expression, Integer, Decimal, render, Polynomial
 from .core import random_list
 from decimal import getcontext
 #getcontext().prec = 2