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