44 lines
1,021 B
Python
44 lines
1,021 B
Python
from itertools import zip_longest
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class Polynomial:
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def __init__(self, *args):
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if len(args) == 0:
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args = (0,)
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self.coeffs = args
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def __repr__(self):
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return 'Polynomial{}'.format(repr(self.coeffs))
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def __str__(self):
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xs = ('{}*x^{}'.format(self.coeffs[i], i) for i in range(len(self.coeffs)))
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return ' + '.join(xs)
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def __len__(self):
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return len(self.coeffs) - 1
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def __add__(self, other):
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return Polynomial(*(x + y for x, y in zip_longest(self.coeffs, other.coeffs, fillvalue=0)))
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def __sub__(self, other):
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return Polynomial(*(x - y for x, y in zip_longest(self.coeffs, other.coeffs, fillvalue=0)))
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def main():
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p1 = Polynomial(1, 2, 3)
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print(p1)
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print(len(p1))
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p2 = Polynomial(2, 3, 4, 5)
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print(repr(p2))
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print(p2)
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print(len(p2))
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print(p1 + p2)
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print(p1 - p2)
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p3 = Polynomial()
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print(repr(p3))
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p4 = Polynomial(0)
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print(p4)
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if __name__ == '__main__':
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main()
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