start working on deg 2 polynoms

pymath/polynomDeg2.py

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+#!/usr/bin/env python
+# encoding: utf-8
+
+from .polynom import Polynom
+from .expression import Expression
+from .operator import op
+from math import sqrt
+
+
+class Polynom_deg2(Polynom):
+
+    """ Degree 2 polynoms
+    Child of Polynom with some extro tools
+    """
+
+    def __init__(self, coefs = [0, 0, 1], letter = "x"):
+        """@todo: to be defined1. """
+        Polynom.__init__(self, coefs, letter)
+
+    @property
+    def a(self):
+        return self._coef[2]
+
+    @property
+    def b(self):
+        return self._coef[1]
+
+    @property
+    def c(self):
+        return self._coef[0]
+
+    @property
+    def delta(self):
+        """Compute the discriminant expression
+        :returns: discriminant expression
+
+        """
+        return Expression([self.b, 2, op.pw, 4, self.a, self.c, op.mul, op.mul, op.sub])
+
+    def roots(self):
+        """Compute roots of the polynom
+        """
+        if self.delta > 0:
+            roots = [(-self.b - sqrt(self.delta)
+
+
+
+
+if __name__ == '__main__':
+    from .render import txt
+    with Expression.tmp_render(txt):
+        P = Polynom_deg2([2, 3, 4])
+        print(P)
+
+        print("Delta")
+        for i in P.delta.simplify():
+            print(i)
+        
+
+
+
+# -----------------------------
+# Reglages pour 'vim'
+# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
+# cursor: 16 del 

test/test_polynomDeg2.py

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+#!/usr/bin/env python
+# encoding: utf-8
+
+
+import unittest
+
+from pymath.polynomDeg2 import Polynom_deg2
+
+
+
+class TestPolynomDeg2(unittest.TestCase):
+    """Testing functions from pymath.polynomDeg2"""
+
+    pass
+
+
+if __name__ == '__main__':
+    unittest.main()
+
+
+
+
+
+
+
+
+# -----------------------------
+# Reglages pour 'vim'
+# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
+# cursor: 16 del 
+