Lambda function with sympy.matrices package clear solution for Determinant by Phil15 - python coding challenges

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Lambda function with sympy.matrices package solution in Clear category for Determinant by Phil15

from sympy.matrices import Matrix
checkio = lambda M: int(Matrix(M).det())

April 6, 2018

Comments:

yoichi on Feb. 16, 2019, 8:24 a.m.
I got to know sympy with your answer. Thank you!

Phil15 on Feb. 16, 2019, 9:06 a.m.
Sympy consider integers like integers. `checkio = lambda M: Matrix(M).det()` is already correct but the type of the integer is a sympy type. `int` change the type to common integer type. With numpy: <pre class='brush: python'>import numpy as np checkio = lambda M: round(np.linalg.det(M)) </pre> Numpy considers it's float numbers so there are little errors. `round` do 2 things here: give us an integer, of the good type. For float matrices with no necessarily integers, `checkio = np.linalg.det` is a better choice.

slchangtw on Dec. 26, 2022, 8:56 a.m.
Great!

Max0526 on May 1, 2023, 4:52 a.m.
Black magic!

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