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__mul__ for poly still __pow__ and an issue with random

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Lafrite 2015-02-27 19:24:27 +01:00
parent 6e0d36f411
commit 8e63c64a65
1 changed files with 41 additions and 30 deletions
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65
pymath/polynom.py
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@ -42,13 +42,13 @@ class Polynom(Explicable):
/!\ variables need to be in brackets {}
>>> Polynom.random(["{b}", "{a}"]) # doctest:+ELLIPSIS
...
< Polynom ...
>>> Polynom.random(degree = 2) # doctest:+ELLIPSIS
...
< Polynom ...
>>> Polynom.random(degree = 2, conditions=["{b**2-4*a*c}>0"]) # Polynom deg 2 with positive Delta (ax^2 + bx + c)
...
< Polynom ...
>>> Polynom.random(["{c}", "{b}", "{a}"], conditions=["{b**2-4*a*c}>0"]) # Same as above
...
< Polynom ...
"""
if (degree > 0 and degree < 26):
@ -326,7 +326,7 @@ class Polynom(Explicable):
>>> Q = P.reduce()
>>> Q
< Polynom [1, 2, 3]>
>>> Q.steps()
>>> Q.steps
[]
>>> P = Polynom([[1,2], [3,4,5], 6])
>>> Q = P.reduce()
@ -437,7 +437,8 @@ class Polynom(Explicable):
return ans
def __radd__(self, other):
return self.__add__(other)
o_poly = self.conv2poly(other)
return o_poly.__add__(self)
def __neg__(self):
""" overload - (as arity 1 operator)
@ -478,27 +479,35 @@ class Polynom(Explicable):
def __rsub__(self, other):
o_poly = self.conv2poly(other)
return o_poly.__sub__(-self)
return o_poly.__sub__(self)
def __mul__(self, other):
""" Overload *
>>> p = Polynom([1,2])
>>> p*3
[< Polynom [3, < Expression [2, 3, '*']>]>, < Polynom [3, < Expression [2, 3, '*']>]>, < Polynom [3, 6]>]
< Polynom [3, 6]>
>>> (p*3).steps
[[< <class 'pymath.expression.Expression'> [2, 'x', '*', 1, '+', 3, '*'] >], < Polynom [3, < <class 'pymath.expression.Expression'> [2, 3, '*'] >]>, < Polynom [3, < <class 'pymath.expression.Expression'> [2, 3, '*'] >]>]
>>> q = Polynom([0,0,4])
>>> q*3
[< Polynom [0, 0, < Expression [4, 3, '*']>]>, < Polynom [0, 0, < Expression [4, 3, '*']>]>, < Polynom [0, 0, 12]>]
< Polynom [0, 0, 12]>
>>> (q*3).steps
[[< <class 'pymath.expression.Expression'> [4, 'x', 2, '^', '*', 3, '*'] >], < Polynom [0, 0, < <class 'pymath.expression.Expression'> [4, 3, '*'] >]>, < Polynom [0, 0, < <class 'pymath.expression.Expression'> [4, 3, '*'] >]>]
>>> r = Polynom([0,1])
>>> r*3
[< Polynom [0, 3]>, < Polynom [0, 3]>]
< Polynom [0, 3]>
>>> (r*3).steps
[[< <class 'pymath.expression.Expression'> ['x', 3, '*'] >]]
>>> p*q
[< Polynom [0, 0, 4, < Expression [2, 4, '*']>]>, < Polynom [0, 0, 4, < Expression [2, 4, '*']>]>, < Polynom [0, 0, 4, 8]>]
< Polynom [0, 0, 4, 8]>
>>> (p*q).steps
[[< <class 'pymath.expression.Expression'> [2, 'x', '*', 1, '+', 4, 'x', 2, '^', '*', '*'] >], < Polynom [0, 0, 4, < <class 'pymath.expression.Expression'> [2, 4, '*'] >]>, < Polynom [0, 0, 4, < <class 'pymath.expression.Expression'> [2, 4, '*'] >]>]
>>> p*r
[< Polynom [0, 1, 2]>, < Polynom [0, 1, 2]>]
< Polynom [0, 1, 2]>
"""
steps = []
# TODO: Je trouve qu'elle grille trop d'étapes... |ven. févr. 27 19:08:44 CET 2015
o_poly = self.conv2poly(other)
coefs = []
@ -521,13 +530,11 @@ class Polynom(Explicable):
coefs.append(elem)
p = Polynom(coefs, letter = self._letter)
steps.append(p)
ini_step = [Expression(self.postfix_tokens + o_poly.postfix_tokens + [op.mul])]
ans = p.simplify()
steps += p.simplify()
#print("steps -> \n", "\n".join(["\t {}".format(s.postfix) for s in steps]))
return steps
ans.steps = [ini_step] + ans.steps
return ans
def __rmul__(self, other):
o_poly = self.conv2poly(other)
@ -617,14 +624,18 @@ def test(p,q):
if __name__ == '__main__':
#from .fraction import Fraction
with Expression.tmp_render(txt):
p = Polynom([10, -5])
print(p.reduce())
q = Polynom([[1,2], [3,4,5], 6])
print("q = ", q)
r = q.reduce()
print("r = ", r)
for i in r.explain():
print("q = ", i)
p = Polynom([1,2,3])
q = Polynom([0, 2])
for i in (p*q).explain():
print(i)
r = Polynom([0,1])
for i in (r*3).explain():
print(i)
# print("q = ", q)
# r = q.reduce()
# print("r = ", r)
# for i in r.explain():
# print("q = ", i)
# print(p-q)
# for i in p-q:
# print(i)