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Short solution using numpy solution in 3rd party category for Skew-symmetric Matrix by swagg010164
import numpy as np
def checkio(matrix):
a = np.array(matrix)
b = np.array(a.transpose())
b *= (-1)
if (a == b).all():
return True
return False
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio([
[0, 1, 2],
[-1, 0, 1],
[-2, -1, 0]]) == True, "1st example"
assert checkio([
[0, 1, 2],
[-1, 1, 1],
[-2, -1, 0]]) == False, "2nd example"
assert checkio([
[0, 1, 2],
[-1, 0, 1],
[-3, -1, 0]]) == False, "3rd example"
Sept. 21, 2018
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