sosokker/Calculator-for-Matrix-and-Algebra
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Add rsub radd r mul method, delete string_form attribute

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This commit is contained in:
Sirin Puenggun 2022-12-11 21:29:05 +07:00
parent 1e1aa128a4
commit 2708cb8867
1 changed files with 12 additions and 3 deletions
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15
nessesary/polynomial.py
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@ -7,11 +7,11 @@ class Polynomial:
if isinstance(poly, str): if isinstance(poly, str):
self.coeff = parse_poly(poly) self.coeff = parse_poly(poly)
self.degree = len(parse_poly(poly)) - 1 self.degree = len(parse_poly(poly)) - 1
self.string_form = poly
elif isinstance(poly, list): elif isinstance(poly, list):
self.coeff = poly self.coeff = poly
self.degree = len(poly) - 1 self.degree = len(poly) - 1
self.string_form = self.to_str()
else: else:
raise ValueError raise ValueError
self.fracmode = fracmode self.fracmode = fracmode
@ -37,7 +37,7 @@ class Polynomial:
'2x^4+2x^3+2x^2+2x+2' '2x^4+2x^3+2x^2+2x+2'
""" """
if isinstance(other, Polynomial): if isinstance(other, Polynomial):
large_index = max([self.degree, other.degree]) large_index = max([len(self.coeff), len(other.coeff)])
temp = [0 for i in range(large_index)] temp = [0 for i in range(large_index)]
result = Polynomial(temp) result = Polynomial(temp)
for degree_index in range(self.degree): for degree_index in range(self.degree):
@ -48,6 +48,9 @@ class Polynomial:
result.coeff[0] += other result.coeff[0] += other
return result return result
def __radd__(self, other):
return self+other
def __sub__(self, other): def __sub__(self, other):
""" """
>>> p1 = Polynomial([1, 1, 1, 1, 1]) >>> p1 = Polynomial([1, 1, 1, 1, 1])
@ -68,6 +71,9 @@ class Polynomial:
result.coeff[0] -= other result.coeff[0] -= other
return result return result
def __rsub__(self, other):
return self-other
def __mul__(self, other): def __mul__(self, other):
""" """
>>> p1 = Polynomial([1, 1]) >>> p1 = Polynomial([1, 1])
@ -90,6 +96,9 @@ class Polynomial:
poly_result = Polynomial(result) poly_result = Polynomial(result)
return poly_result return poly_result
def __rmul__(self, other):
return self*other
def __pow__(self, other): def __pow__(self, other):
""" """
>>> p1 = Polynomial([1, 1]) >>> p1 = Polynomial([1, 1])