add source code file

pypolynom/polynom.py

+# coding: utf-8
+
+"""This is a simple demonstration library"""
+
+__authors__ = ["Pierre Knobel", "Jerome Kieffer", "Pierre Palero",
+               "Henri Payno", "Armando Sole", "Valentin Valls",
+               "Thomas Vincent"]
+__date__ = "17/11/2016"
+__license__ = "MIT"
+
+
+def sqrt(x):
+    "Return the square root of x"
+    return x**0.5
+
+
+def polynom(a, b, c):
+    """Compute the polygon of order two
+    :param a:a value of the polynom
+    :type a: float
+    :param b: b value of the polynom
+    :type b: float
+    :param c: c value of the polynom
+    :type c: float """
+    delta = pow2(b) - 4.0 * a * c
+    solutions = []
+    if delta > 0:
+        solutions.append((-b + sqrt(delta)) / (2.0 * a))
+        solutions.append((-b - sqrt(delta)) / (2.0 * a))
+    elif delta == 0:
+        solutions.append(-b/(2.0*a))
+    return solutions
+
+
+def pow2(x):
+    """Return the square of x
+    :param x: input value
+    :type x: float"""
+    return x*x
+
+
+def test():
+    """Test the library"""
+    assert(pow2(2.0) == 4.0)
+    print("All OK")
+
+
+if __name__ == '__main__':
+    print("Running unit tests")
+    test()