numpy.polynomial.legendre.leggauss(deg)
[source]
GaussLegendre quadrature.
Computes the sample points and weights for GaussLegendre quadrature. These sample points and weights will correctly integrate polynomials of degree or less over the interval with the weight function .
Parameters: 


Returns: 

New in version 1.7.0.
The results have only been tested up to degree 100, higher degrees may be problematic. The weights are determined by using the fact that
where is a constant independent of and is the k’th root of , and then scaling the results to get the right value when integrating 1.
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https://docs.scipy.org/doc/numpy1.17.0/reference/generated/numpy.polynomial.legendre.leggauss.html