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pythonlistsympypolynomials

List of coefficients to polynomial

How do I create a polynomial out of a list of coefficients in SymPy?

For example, given a list [1, -2, 1] I would like to get Poly(x**2 - 2*x + 1). I tried looking at the docs but could not find anything close to it.

Solution

  • You could use Poly.from_list to construct the polynomial:

    >>> x = sympy.Symbol('x')
>>> sympy.Poly.from_list([1, -2, 1], gens=x)
Poly(x**2 - 2*x + 1, x, domain='ZZ')